Posts Tagged ‘spring-piston’
Beeman HW 70A air pistol: Part 4
by Tom Gaylord, a.k.a. B.B. Pelletier
Beeman’s HW 70A breakbarrel spring pistol.
Remember that I said I would return and do another accuracy test of the Beeman HW 70A pistol because I didn’t test the best pellet seated? I felt a little guilty about missing that; but after my wife, Edith, got done with me, I felt really guilty. Good job, Edith!
Today is a revisit to see the effects of deep-seating the best pellet, which you may recall was the Beeman H&N Match. The other two pellets I shot last time aren’t in the running, so they don’t get retested.
However, a reader commented that his HW 70A really likes the JSB Exact RS dome, so that one got tested, too.
Several readers described their pistols as very accurate. One person even said his was a tackdriver. That really drives me nuts because of the results I’m getting. And I’m a good pistol shot — plus, I’m shooting the gun rested! I ought to be there with the best of you, but up to this point I’m not.
Beeman H&N Match
This was the best pellet in the first accuracy test, so this is the one I started with. And I started with the deep-seated pellets. I’m using the Air Venturi Pellet Pen and Seater, and the adjustment hasn’t changed since the last time, so everything is equal.
The first group was pretty poor. I thought I’d forgotten how to shoot because it looked nothing like the group of flush-seated pellets from the last time.
Ten deep-seated Beeman H&N Match pellets made this 1.532-inch group at 10 meters.
That prompted me to try a group of the same pellets seated flush. You will remember in Part 3 that, when these were seated flush, 10 of them made a 1.085-inch group. This time 10 flush pellets went into 1.067 inches. That’s pretty close to the last time, and very persuasive that flush-seating is what this pellet likes!
Ten flush-seated Beeman H&N Match pellets made this 1.067-inch group at 10 meters. That’s close to what they did the last time.
JSB Exact RS
Next I tried some JSB Exact RS domes — just to see if I could duplicate what a blog reader reported. Lo and behold, I did! As I was shooting, I could see that the group didn’t seems to be growing, and I had a sense that the pistol was drilling the target. As you can see, it was doing exactly that! Ten pellets in 0.761 inches at 10 meters. I wouldn’t call it a tackdriver, but it’s the next best thing.
Ten flush-seated JSB Exact RS pellets made this 0.761-inch group at 10 meters. Pretty good!
Next, I was going to try the same pellet seated deep, but that’s when I saw that the barrel was flopping from side to side at the breech! Oh, no! All that work for nothing!
Fortunately, this pistol has a pivot bolt that can be both tightened and also locked in position with a jam screw. However, I didn’t have time to do that because I was crashing on tests to put in the bank for my trip to see my friend Mac.
When I return from my trip, I’ll tighten the breech and rerun this entire test — plus shoot the RS pellet deep-seated. So, there’s fifth part coming.
Beeman HW 70A air pistol: Part 3
by Tom Gaylord, a.k.a. B.B. Pelletier
Beeman’s HW 70A breakbarrel spring pistol.
Today you get a twofer. Or at least it will be more than just one test, as I’m starting to test a second product with today’s accuracy test of the Beeman HW 70A pellet pistol. The other product I’m testing is the EyePal Master Kit for Rifles and Pistols. Because it did play a pivotal part in today’s test, let’s begin with it.
EyePal Master Kit for Rifles and Pistols
The EyePal is a soft patch that’s applied to prescription or safety glasses to provide an aperture for the sighting eye. This concept is close to a century old, and many of the veteran readers will remember the Merit adjustable iris that had a suction cup to attach to glasses. The Merit was adjustable, so the aperture you looked through was controlled by the user. The EyePal is not adjustable. In the Master Kit I’m evaluating, there’s one soft patch for handguns and another for rifles. They have different sized holes, and the handgun patch that I used in today’s test has the slightly larger hole. The lids on the boxes and the patches themselves are color-coded so you know what each one is.
The EyePal Master Kit contains an eyepatch for pistols and another for rifles.
The pistol eyepatch has gold lettering.
The rifle eyepatch has white lettering, and the hole is slightly smaller than the pistol eyepatch hole.
The EyePal patch attaches by just laying it on the surface of the glasses (safety or prescription) and rolling it flat.
I won’t report on the EyePal as a separate item because I need to use it more than a few times to get comfortable with how it works. So, very much as I reported on the Winchester Airgun Target Cube over several tests that spanned many months, I will do the same with the EyePal.
I’ve tried the Merit accessory in the past and found it to be quite difficult to position. Also, as it aged, the rubber suction cup that held it to the glasses hardened and became less pliable — to the point that it eventually stopped working.
The EyePal patch, in sharp contrast, attaches easily and can be removed just as easily, though it does have to be pried up at one corner before it comes off. I find that it’s very intuitive to use the first time and that repositioning it is simple and needs no explanation.
Shooting the HW70A
Now, it’s time for the test. I found myself faced with a number of test variables, so I decided to test all of them with the first pellet, and then use the best result from those tests for the other pellets. The first pellet was the RWS Hobby. The test was a rested pistol held in two hand at 10 meters. I used standard 10-meter air pistol targets.
When I say I shot the pistol rested, I mean that both my arms rested on a sandbag. The pistol was held forward of the bag, so it never touched them to set up a variable recoil reaction. I kept both hands in the same place on the pistol for each shot.
The variables
I had to test this pistol under the following circumstances:
* Pellet seated deep and EyePal worn
* Pellet seated flush and EyePal worn
* Pellet seated flush and prescription glasses worn with no EyePal
* Pellet seated flush and no prescription glasses worn with no EyePal
The 4 targets for the first part of the test are shown below. I used RWS Hobby pellets every time for these 4 targets. After you look at the results, I’ll critique them and tell you what I found.
Hobbys were deep-seated and EyePal was worn on prescription glasses. Group measures 1.522 inches between centers.
Hobbys were seated flush and EyePal was worn on prescription glasses. Group measures 1.863 inches between centers. The large central group within this group made me think this was the best group of Hobbys.
Hobbys were seated flush and EyePal was not worn on prescription glasses. Group measures 1.953 inches between centers.
Hobbys were seated flush and prescription glasses were not worn. Group measures 1.953 inches between centers. I know that sounds too coincidental, but that’s what it measures.
Critique
First, I have to tell you the EyePal did make the front sight appear sharp when glasses alone did not. However, without glasses, the front sight appeared just as sharp as with the EyePal. What I did not know until I measured all the groups for this report was that deep-seated pellets measurably outshot all flush-seated pellets. That was a surprise; and if the Hobby pellet was the only one I used, I would re-run this test. But as you’ll soon see, I don’t have to.
The next thing I discovered is that the Hobby pellet wasn’t a good fit for this gun. These groups do not show what the HW 70A can do. However, this does illustrate an important point. By staying with the same pellet and varying other things, it didn’t really matter that the pellet wasn’t the best. I was still able to compare the effects of the other variables by staying with the same pellet.
Next, I must say that the trigger that I liked in Part 2 isn’t as crisp as I would like it to be. It has a very mushy, indistinct pull and release comes as a surprise every time. While that sounds good, it actually isn’t because the trigger can go off before you’re ready.
The bottom line for the first test is that deep-seated pellets and the EyePal on prescription glasses produced the best results. However, I did not pick up on that during the test, and shot all the other groups with the EyePal and flush-seated pellets.
Test 2: 3 other pellets
Next, I shot the pistol with Crosman Premier 7.9-grain pellets. The group measured 2.163 inches between centers and was clearly not in the running for this pistol.
Premier lites were seated flush and EyePal was worn on prescription glasses. Group measures 2.163 inches between centers. It looks like only 9 pellets were fired, but they were counted carefully and there were 10. Not a pellet for this air pistol.
Then, I tried 10 Beeman H&N Match pellets. Bingo! This was the pellet I was looking for. Ten made a 1.085-inch group that’s very round and unifirm.
Group measures 1.085 inches between centers. Ladies and gentlemen, we have a winner! This is the accuracy I expected from this pistol.
Because the H&N Match pellets did so well, I also tried RWS R10 Match Pistol pellets. For them, I adjusted the sights back to the center of the bull. They didn’t do as well as I’d hoped, grouping in 1.18 inches. While that’s the second-best group of the test, the H&Ns are clearly better this time.
Group measures 1.18 inches between centers. It’s a possible second good pellet, but more testing is needed.
Final evaluation
For those who keep score, I shot this pistol 70 times in this test. I was concerned about getting tired, but the best two groups were the last two. So, I think I gave it a fair evaluation. However, I do admit that the best method of loading is deep-seating pellets, and I didn’t use that on the most accurate pellets. I’m going to come back and do a part 4. It’ll be at 10 meters, again, and only Beeman H&N Match pellets from this test will be used along with several new target pellets.
Beeman HW 70A air pistol: Part 2
by Tom Gaylord, a.k.a. B.B. Pelletier
Beeman’s HW 70A breakbarrel spring pistol.
Okay, there’s some interest in this Beeman HW 70A, but many of you have avoided it like I have. Let’s see what it can do.
First, the cocking effort. HW advertises 21 lbs., however the test pistol registered 27 lbs. on my bathroom scale. While that may not sound like a lot, remember this is a close-coupled pistol, so there’s no long lever like you have on a breakbarrel rifle. So, 27 lbs. does feel like a lot.
The trigger-pull, on the other hand, is very light. The test pistol releases at just 2 lbs., 3 ozs. And that’s after I adjusted it to be heavier. I’d gotten it so low that it surprised me when it went off. That felt too dangerous; but where it is now feels pretty good.
Premier 7.9-grain domes
The first pellet to be tested was the Crosman Premier 7.9-grain pellet. It averaged 371 f.p.s., and the spread went from a low of 364 to a high of 381 f.p.s. At the average velocity, this pellet generates an average 2.43 foot-pounds of energy at the muzzle.
RWS Hobby
Next up was the 7-grain RWS Hobby. As light as they are, I expected Hobbys to be the speed demons of the bunch, but they weren’t. Hobbys averaged just 363 f.p.s., with a spread that went from 354 to 372 f.p.s. At their average velocity, Hobbys produced 2.05 foot-pounds of energy at the muzzle.
Beeman H&N Match
The last pellet I tested was the Beeman H&N Match pellet. This wadcutter weighs 8.18 grains and was the heaviest pellet I tested. The average nuzzle velocity was 383 f.p.s. — making this not only the heaviest but also the fastest of the 3 pellets tested. The range went from 371 to 395 f.p.s. At the average velocity, they generated 2.67 foot-pounds of energy at the muzzle.
I was puzzled
After testing these 3 pellets, I was puzzled about the velocity claims of 440 f.p.s. by the manufacturer. I thought that Hobbys would at least get close to that number, but as you can see, they were the slowest pellets of all, not to mention being the lightest. That made me wonder why they would be so slow. It seemed that they were also the pellet with the largest skirt, so maybe the gun was having difficulty overcoming the pellet in the breech. That’s when I thought about deep-seating each pellet with the Air Venturi Pellet Pen and Seater to see how it would change — if at all.
Deep-seated Hobbys now averaged 419 f.p.s. and the spread that had been 18 f.p.s. before was now down to just 9 f.p.s. The muzzle energy went up from 2.05 foot-pounds to 2.73 foot-pounds.
H&N Match also increased, but the difference was much less. After deep seating, they averaged 392 f.p.s. and generated 2.79 foot-pounds at the muzzle. The total spread dropped from 24 f.p.s. to just 7 f.p.s.
Even Premier lites increased from 371 to 380 f.p.s., bumping the muzzle energy to 2.53 foot-pounds. And the total spread dropped from 17 f.p.s. to just 8 f.p.s.
Deep-seating seems to help calm this gun down and also to boost velocities. I guess I’ll have to try it when I test the pistol for accuracy, as well.
Impression thus far
Though the velocity seems to be a little low, the firing behavior is smooth and positive. The pistol feels right when it fires, and I think it’s going to turn in some surprising accuracy. But we shall see.
Beeman HW 70A air pistol: Part 1
by Tom Gaylord, a.k.a. B.B. Pelletier
Beeman’s HW 70A breakbarrel spring pistol.
I’m about 19 years late on this report. The Beeman HW 70A air pistol was around in 1994 when I started writing about airguns, and I ignored it — finding other guns to occupy my time. I guess there are several reasons for that.
For starters, this pistol always looked large and rough to me. I never saw one of these guns close up in the early days, and I certainly never shot one; but I did see the BSF S-20 pistol that looked for all the world like a small air rifle — cut down and fitted to an outlandish wooden pistol grip. I projected that image onto the HW70, as in the catalog photos it looked very similar.
It was called just the HW 70 back in those days. The “A” designator was added to the model number when they put it into a synthetic black pistol grip that’s on the gun I’m testing for you now. And the size was mostly an illusion. This pistol is similar to a Crosman 2240 rather than the outlandish BSF S-20.
Compared to the BSF S-20 (top) and the Crosman 2240 (bottom), the HW 70A doesn’t seem that big.
For those with a real collector bent, the automatic safety was added some time after the A model was already on the market — so the auto safety on the left side of the stock isn’t what makes it an A version. It’s the synthetic stock. There are A-version guns with synthetic stocks and no auto-saftety out there in collectorland, for those who obsess over minutia.
The automatic safety switch is on the left side of the stock.
Another turn-off for me was the anticipated cocking effort such a pistol was sure to require. I imagined cocking it would be like bending the bow of Hercules. I had also thought that about the big BSF and only discovered after getting one that the gun is relatively easy to cock. The HW 70A, on the other hand, does take some muscle power, and that can be attributed to its 6-inch barrel, which is rather short for a breakbarrel springer.
And, finally, I was concerned that the pistol would be very rough to shoot. When I got to shoot the BSF, its smoothness surprised me, but it’s nothing compared to this HW 70A. This is a very smooth air pistol!
Perhaps, that’s because the makers are not trying to send pellets downrange at the speed of light. The velocity specs of the .177 HW 70A have been 440 f.p.s. for as long as I’ve been writing about airguns. What it can really do is something we’ll discover together as I test this gun for you.
I know this — the HW70A is not usually the top air pistol on anyone’s list. Those who want power will gravitate toward the Diana RWS LP8 or the Beeman P1. Others wanting accuracy will go for the Beeman P17 or perhaps the IZH 46M. Almost nobody goes after the HW 70A as a first choice.
The pistol
This is a breakbarrel spring-piston air pistol that comes in .177 caliber, only. It weighs 2 lbs., 6 oz., and the grip is contoured to fit very well in medium to large hands. The grip/stock is black synthetic and checkered on both sides. The triggerguard is molded right into the stock.
Extensive use is made of aluminum in the construction of this pistol. The spring tube and outer barrel jacket are made of it, but the true barrel is a thin steel tube inside the outer jacket. The finish is a dark black epoxy that will fool everyone into thinking it’s black oxide, which is what we commonly call bluing. I only know that from an old Beeman catalog entry.
Most of what the hand touches on this pistol is cold metal, except for the grips. Even the sights that could be made from plastic are metal.
The pistol is very nearly 100 percent ambidextrous. The only feature that favors one side over the other is the safety switch that slides on the left side of the stock.
The barrel is held closed by a ball-bearing detent that allows the barrel to open easier, while still maintaining a tight seal when closed. It’s a classic means of locking the barrel when the pressure level doesn’t go too high.
Trigger
The trigger is two-stage and adjustable for pull weight. A screw in front of the trigger blade is turned to make the adjustment. It seems like the adjustment acts on a direct sear, apparently decreasing the sear contact area. Even if that’s not the case, though, I was able to adjust the trigger too light for safe operation. The second-stage stop disappeared, and I had a trigger that was guesswork instead of positive; so, I adjusted it back to where it had been from the factory, and that’s where I’ll leave it.
The trigger blade is wide and smooth. It’s made of aluminum, which will appeal to many shooters.
Sights
The sights are thankfully NOT fiberoptic! The rear sight is fully adjustable. Elevation has crisp detents, but windage has none, nor is there a scale for reference. You just have to watch where the notch is and where it moves when you adjust it.
The front sight is a very sharp, square post that fits very well into the rear notch. It’s covered by a steel hood to protect the hands when cocking.
Accuracy
The Beeman catalog used to claim this pistol could group 5 shots in 0.32 inches at 10 meters. I’ll test that when we get to the accuracy report. The gun is not scopeable by normal means, but at one time Beeman sold a special model called the Black Arrow that did come scoped. It had a proprietary scope mount that replaced the rear sight, but it’s no longer available.
That doesn’t matter to me because I would only shoot a handgun like this with open sights anyway. But some shooters want to scope even their handguns, so they need to know that this one can’t be scoped.
I’m looking forward to testing this airgun — I have been for nearly two decades. It’s time to hear the fat lady sing!
And now for something completely different
Pyramyd Air is looking for a manager for their tech department. This position was posted on the blog several weeks ago, but they’re still looking. If you’re interested, please apply. Below is the job info and where to send your resume.
Directs and coordinates activities of the department in providing customers technical services and support; directly supervises employees. Responsibilities include but are not limited to:
Coordinates technical support services between management, tech support staff, sales department, and customers.
Establishes and documents department procedures and objectives.
Accomplishes department objectives by selecting, orienting, training, assigning, coaching, counseling, and disciplining employees; communicating job expectations; and monitoring performance.
Maintains and improves support operations by monitoring staff and system performance, identifying and resolving problems, and preparing and completing action plans
Provides technical assistance to customers and labor quotes. Handles escalated calls or provides assistance requiring more complex issues.
Installs common accessories and kits in accordance with customer orders.
Performs tests on guns to determine advertised performance specifications.
Required experience, skills and background:
Bachelor’s degree and 3 years managerial experience, or an equivalent combination of education and experience required. Previous industry experience required.
Must be detail-oriented with good mechanical aptitude.
Ability to prioritize and multi-task.
Good communication and customer service skills.
Good computer skills.
Hours: Monday through Friday, 9am until 5:30pm; longer hours and some Saturdays are expected, especially during our busy peak periods.
Preferred experience, skills and background:
Previous experience in airgun repair or troubleshooting desired.
Send your resume to resumes@pyramydair.com
The benefits of oiling pellets: Part 2
by Tom Gaylord, a.k.a. B.B. Pelletier
Let’s begin testing the effects of oiling pellets. There are numerous ways to approach this issue, and I have to pick one at a time and limit the test to just that. But I think as long as I’m testing one aspect, I ought to test it thoroughly so someone can’t come back and second-guess me later in the report.
So, today I’ll test with one rifle, and the next time I’ll test with another. What I won’t do is test with each different brand of airgun, just to see what will happen. If a powerful gas spring rifle performs in a certain way, I’ll assume that all powerful gas spring rifles are going to do the same. If the difference between dry pellets and oiled pellets is close, I may do additional testing; but if there’s clear separation, I’ll accept that as the way it works.
What am I testing?
The question that started this experiment was, “How much faster will oiled pellets shoot than those that are not oiled?” One reader has asked me to also test this downrange because he wonders if a thin coat of oil changes the laminar flow of air around a pellet. I may get to that at some point, but for the present I’m just concerned with muzzle velocity because all pellets slow down after they exit the muzzle — oiled or not.
I suppose this needs to be tested in all three powerplant types, but today I’m testing it in a spring-piston powerplant. Today’s gun is a weak powerplant, so next time I’ll test it in a more powerful gun.
I’m using an HW55 SF target rifle to test three pellets. This rifle is a variation of the old HW50 rifle, so it shoots in the 600-650 f.p.s. region with lead pellets.
Since oiled pellets will leave a film in the bore, I tested all pellets dry first, and then tested the oiled pellets afterwards. Before the first test shot with oiled pellets, I fired two pellets to condition the bore. That turned out not to be enough, but I’ll come to that later.
Pellet shapes
I’ll test the three major pellet shapes in this test. They’re the wadcutter, dome and pointed head. There are other shapes, like hollowpoints, but they’re based on one of these three main shapes, so this is all I’m testing.
How I oil pellets
I oil pellets in the following manner. A foam liner is placed in the bottom of a pellet tin, and 20 drops of Whiscombe Honey are dropped onto the foam. Then, a single layer of pellets is spread on the foam, and the tin is rolled around. I shake the tin lightly to move the pellets around…but not enough to damage them. Whatever oil transfers to the pellet is all the oil it gets. I’ve been doing this for many years and it works well.
Twenty drops of oil on the foam is what I use. Then, a single layer of pellets.
One tin for each type of pellet used in the test.
The pellets end up with a very light and uniform coat of oil. When I handle them the tips of my fingers become oily, but I can’t see any oil on the pellets. Other people use more oil than I do, but this is what I am testing.
Whiscombe Honey is a mixture of two-thirds Hoppes Gun Oil (not Number 9 bore cleaner!) and one-third STP Engine Treatment, by volume. Shake the mixture until is takes on a light yellow color. It will look like thin honey, hence the name. This mixture should not detonate easily in a spring gun.
Test one — dry pellets
Crosman Premiers
Crosman Premier 7.9-grain pellets were the domes I tested. The average velocity for dry Premiers was 606 f.p.s., with a low of 577 and a high of 616. So, the spread was 39 f.p.s. The average muzzle energy was 6.44 foot-pounds.
Gamo Match
For wadcutters, I tested Gamo Match pellets. The average for dry pellets was 652 f.p.s., with a low of 640 and a high of 663 f.p.s. The spread was 17 f.p.s. The average energy was 7.14 foot-pounds.
H&N Neue Spitzkugel
The pointed pellet I selected was the H&N Neue Spitzgugel. When shot dry, they averaged 601 f.p.s., with a low of 585 and a high of 620 f.p.s. The spread was 34 f.p.s. The average muzzle energy was 6.81 foot-pounds at the muzzle.
Oiled pellets
Now, I shot two oiled pellets through the bore to condition it and began the test.
Oiled Crosman Premiers
Oiled 7.9-grain Premiers averaged 591 f.p.s., but the spread went from a low of 545 to a high of 612 f.p.s. That’s a spread of 67 .p.s. The average energy for oiled pellets was 6.13 foot-pounds. I did notice the pellets were going faster at the end of the shot string, so I thought I might come back to them after testing the other pellets.
Oiled Gamo Match pellets
The oiled wadcutters averaged 658 f.p.s. — a slight gain over the dry pellets. But the real news was the spread, which went from a low of 651 to a high of 663 f.p.s. Instead of a 17 f.p.s. for the dry pellets, the oiled pellets gave a spread of just 12 f.p.s. That’s too close to draw any conclusions, but it’s interesting. The average energy with the oiled pellets was 7.27 foot-pounds. So, with the oiled pellets, the velocity went up — along with the energy — and the shot-to-shot variance went down.
Oiled H&N Neue Spitzkugel
Oiled Spitzkugels averaged 609 f.p.s. — which was a small increase over the same pellet when dry. The average energy was 6.99 foot-pounds. The spread went from 585 to 620 f.p.s, which was identical for the same pellet dry. Velocity and energy were both up slightly from dry pellets, and the shot-to-shot variance remained the same.
By now, it’s obvious that the bore needed more than two shots to condition it, so I retested the oiled Crosman Premiers. The second time the oiled pellets averaged 604 f.p.s., which is just 2 f.p.s. slower than the same pellets dry. But the spread that was 67 f.p.s. on the first test of oiled pellets and 39 f.p.s. with dry Premiers now went from a low of 594 to a high of 613 f.p.s. — a much tighter 19 f.p.s. total. The average energy was 6.40 foot-pounds.
Observations
From this test, I observed that these three pellets either remained at the same velocity or increased very slightly from the light oiling I gave them. In two of the three cases, the velocity spread got tighter when the pellets were oiled.
I further observed that it’s necessary to condition a bore with oiled pellets before doing any testing. As a minimum, I would say that 20 oiled pellets should be fired before testing.
These are very small differences from oiling; and although I can’t draw any conclusions yet, I would think that such a small change is not enough to matter. It hardly seems worth doing at this point. However, there’s still a test to be done in a powerful airgun. Until we see those results, I think it’s too soon to say anything for sure.
Although the question that drove this test was how much faster oiling pellets makes them shoot, I think we still have to take accuracy into account before forming any opinions.
And now for something completely different
Pyramyd Air is looking for a manager for their tech department. If you’re interested in the position, below is the job info and where to send your resume.
Directs and coordinates activities of the department in providing customers technical services and support; directly supervises employees. Responsibilities include but are not limited to:
Coordinates technical support services between management, tech support staff, sales department, and customers.
Establishes and documents department procedures and objectives.
Accomplishes department objectives by selecting, orienting, training, assigning, coaching, counseling, and disciplining employees; communicating job expectations; and monitoring performance.
Maintains and improves support operations by monitoring staff and system performance, identifying and resolving problems, and preparing and completing action plans
Provides technical assistance to customers and labor quotes. Handles escalated calls or provides assistance requiring more complex issues.
Installs common accessories and kits in accordance with customer orders.
Performs tests on guns to determine advertised performance specifications.
Required experience, skills and background:
Bachelor’s degree and 3 years managerial experience, or an equivalent combination of education and experience required. Previous industry experience required.
Must be detail-oriented with good mechanical aptitude.
Ability to prioritize and multi-task.
Good communication and customer service skills.
Good computer skills.
Hours: Monday through Friday, 9am until 5:30pm; longer hours and some Saturdays are expected, especially during our busy peak periods.
Preferred experience, skills and background:
Previous experience in airgun repair or troubleshooting desired.
Send your resume to resumes@pyramydair.com
The benefits of oiling pellets: Part 1
by Tom Gaylord, a.k.a. B.B. Pelletier
This report will be lengthy because I want to test several aspects of oiling pellets. For starters, I want to test it with spring guns, PCPs and CO2 guns just to get a complete picture of what, if anything, oiling pellets is doing in each of those powerplants. I’m interested in velocity because of the question that spawned this blog, but accuracy might also be interesting to test.
The question
We received this question in the following form. I will paraphrase, but this is the gist of it, “How much faster do pellets go when they are oiled?” That question came in on one of our social networks and was referred to me for an answer. Well, you know me! Give me a topic and I turn it into a week’s worth of blogs. But this question really begged for the full treatment because there’s so much to cover.
History
When I got interested in shooting airguns as an adult in the middle 1970s, the question of oiling pellets wasn’t around (as far as I know). In talking with the late Rodney Boyce, I learned that the oiling question really came to a head when PCPs first started being used in the early 1980s. A PCP shoots very dry air, and their barrels are made from steel; so, at the higher velocities, they tend to get leaded bores. Some shooters were also oiling pellets for their spring guns; but a lot of the time they did it because they washed the pellets, thinking the black compound on them was dirt. In fact, it was anti-oxidant to keep the pellets from turning to white dust. Had they just left the pellets alone, they wouldn’t have oxidized.
In defense of the spring-gun guys who washed their pellets, though, some brands did have a lot of lead swarf (flakes of lead from the manufacturing process) inside some of the pellets, and vigorous washing did remove it. But then the pellets needed to be oiled again, or they would quickly oxidize.
Why we oil pellets
We oil pellets for two reasons. The first is to prevent the oxidation of the lead after washing. The second is to reduce the leading of the bore, though this is principally a PCP problem. Other pneumatics either shoot too slowly or they have brass or bronze barrels that do not allow the lead to attach itself, so they do not lead up.
Do oiled pellets shoot faster?
That was the question that started this report. I’ve tested this in the past and found that with a PCP shooting .177 pellets at 850-900 f.p.s., oiled pellets went slower, not faster. But that was just one test, and I don’t want to say what oiling will do for other guns until I do some more testing.
Flimflam man
I’ll tell you this — oiling pellets became such a hot topic in the late ’90s that people were swapping their favorite secret formulas on the internet. And I know one UK company that sells an oil for pellets that they still claim gives increased velocity. Well, that’s too good to pass up, so I’ll test some of their oil in this test.
Not just oil
Don’t think that oil is the only thing people put on pellets. I remember lengthy discussions of how to apply a thin even coat of wax on pellets. Then, the topic shifted to what kind of wax to use! One guy went so far as to specify a high-tech boat hull compound called Bo-Shield for his pellets. When he talked about it his eyes got that faraway stare, as though he was transcending the real world and entering the spirit world.
What I will test
The first thing I want to do — have to do, in my mind — is test what the application of oil does to the velocity of pellets. Okay, that opens about 10 worm cans, right there:
What constitutes “an application of oil”? (I have seen paragraphs of instructions telling you how to know if the application of oil has been enough or if you need more.)
Am I testing this on lightweight pellets? Heavy pellets?
Do I test a powerful springer as well as a lower-powered springer?
Do I also test this on a precharged pneumatic?
A powerful PCP and a lower-powered PCP?
What about testing on a CO2 gun?
And on and on….
I think the best approach is to ask the question: Why do we oil pellets and who does it? We know that people who wash pellets also oil them, and we know that PCP users oil them; so that includes all the categories above. I don’t see a need to go to the extremes with this test. I’m not HP White Labs, and this isn’t a burning consumer question. If the findings suggest further testing, I could decide at that point?
What about the possible side effects?
Will oiling a pellet cause extra dieseling? Maybe. Is that what’s behind those flimflam salesmen who claim that oiled pellets go faster than dry pellets? I don’t know for certain; but as long as I’m going down the path, this is something I want to look at. Obviously, we’re talking only about powerful spring guns.
Does oiling affect accuracy?
I don’t know, but it seems we ought to find out. This gives me another excuse to unlimber my R8…so, hurrah!
Have I forgotten anything?
You tell me if I’ve overlooked any test that ought to be conducted. This isn’t a guessing game or a creativity contest, so please tell me only things that really matter to you.
Theoben Crusader breakbarrel air rifle
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, blog reader Paul Hudson shares his Theoben Crusader rifle with us. The Crusader is not as well-known in the U.S. as some other Theoben models, so this will be an interesting report.
If you’d like to write a guest post for this blog, please email us.
With its walnut stock, the Theoben Crusader is a large, handsome airgun.
The Theoben Crusader is a high-power breakbarrel airgun, identical in size and performance to the Beeman R1. Its stablemate, the Theoben Eliminator, seems to get far more press since it’s one of the most powerful breakbarrel airguns available. That power comes with a high price — a cocking effort of 50+ lbs. — that most shooters are not willing to endure for very long. The Crusader, on the other hand, is far easier to cock and is a more practical airgun. Based on the used guns I’ve seen for sale, either the Crusader sales are much lower or people tend to keep them. Few are seen on the usual airgun sales sites or at airgun shows.
The Crusader is a high-quality spring-piston rifle.
Measuring a full four feet in length and weighing 8 lbs., 3 oz. unscoped, the Crusader is a large airgun. Mine is .177 caliber; but .20, .22, and .25 calibers are also available. The Lothar Walther barrel is 16 inches long, and a muzzlebrake is standard equipment (.22-caliber Crusaders have an Anschütz barrel). There are no baffles in the muzzlebrake. No open sights are supplied by the factory, making an optical sight a necessity. My rifle has a right-hand walnut stock, but an ambidextrous stock can be had from the factory as a no-cost option. The pressed checkering does give enough grip to be functional. A very good non-slip recoil pad keeps the rifle in place. No plastic parts are used on the rifle.
The metal work on the Crusader is first-rate, with a high polish that’s typical of many British airguns, and the wood-to-metal fit is excellent. Allen-head screws are used throughout the gun except for one screw that secures the triggerguard.
Behind that screw, a Schrader valve allows the owner to change the air pressure in the gas spring. Note the thumb rest in the stock.
A gas spring
Like all Theoben springers, the Crusader uses a gas spring, not a metal spring. Cocking is butter-smooth and requires 38 lbs. of effort. The piston includes a sliding weight that reduces piston bounce and felt recoil. A Schrader valve at the rear of the receiver allows the pressure in the gas spring assembly to be adjusted to vary the power of the gun. Upon firing there’s no spring twang or vibration, just a quick snap. The sound level is moderate. And, due to the size of the gun and careful tuning, the felt recoil is mild for the power level.
The lower bolt is pinched between the breech block and the locking wedge to prevent vertical barrel movement. Note the taper at the rear of the barrel to make pellets easier to seat.
The barrel pivot setup on the Crusader is a little unusual. Most breakbarrels use a breechblock that’s close to the width of the forks of the receiver. Wide, thin shims may also be present between the breechblock and the receiver forks. The pivot bolt is then tensioned to the point that the lateral barrel movement is constrained. The breechblock on the Crusader has much more side clearance. Belleville washers are used to control the lateral movement. Belleville washers are cone-shaped from the side and are actually considered to be springs. A second bolt behind the pivot bolt mates with a hook on the back of the breechblock. The locking wedge pulls the breechblock tightly against this bolt to control the vertical movement of the barrel. Like many classic Webley rifles, the Crusader takes a bit of a slap to open the barrel for cocking.
The unusually wide breechblock/fork clearance is visible from below the action. (The photo is overexposed, leading to the yellow stock color. This was necessary to bring out the detail within the cocking slot.)
The trigger
The Evolution trigger of the Crusader and other models has been criticized by some; and given the price of the gun, that may be justified. No creep is felt in the first stage, but the second stage is not as crisp as a Rekord trigger. As the gun came from the factory, the second stage breaks cleanly at 1 lb., 13 oz. The safety blade resides in front of the trigger and automatically sets when the gun is cocked. It can also be manually reset. Overall, I would rate the Crusader trigger as very good, just not quite as good as a Rekord or TX200 unit but not a reason to avoid the gun.
The trigger blade is almost straight; the automatic safety resides in the front of the triggerguard and is pressed forward to fire.
Performance
Velocities with the Crusader are similar to what’s found in a Beeman R1, and some lighter pellets in a .177-caliber rifle will go supersonic and ruin the accuracy. I tried a couple H&N Field Target Trophy Green pellets, but they traveled almost 1200 feet per second and missed the bullet trap at 25 yards. Extreme spreads with most pellets were under 20 feet per second, and a few varied by less than 10…very good for a springer.
These are the velocities the Crusader can deliver with the selected pellets.
25-yard accuracy
Many pellets gave 5-shot groups around an inch in size at 25 yards. Several gave very good accuracy, including a few that surprised me. To get the best accuracy shooting from the bench, I had to hold the airgun loosely with my right hand and keep my left hand open. If I let my fingers touch the forearm, I had to make sure I didn’t squeeze the gun at all or the groups would open up. In other words, use the classic artillery hold. You cannot grip this airgun tightly and get good accuracy; it’ll take practice and proper technique to get the best results.
All groups were 5 shots at 25 yards, and the sights were not adjusted for the different pellets. It was interesting to see the difference in the points of impact. Predator Polymags and 8.4-grain JSB Exacts shot especially high in relation to the other pellets. Unfortunately, neither 7.9-grain Crosman Premier lites nor 10.5-grain Premiers heavies did much better than one-inch groups at 25 yards. While that’s not too bad, a number of pellets did far better.
Five H&N Baracuda Hunters made this 0.50-inch group.
Five Predator Polymag pellets made this 0.40-inch group. Good enough for hunting.
Gamo TS-10 surprised me with a 0.45-inch group; but their size seemed a bit inconsistent, and there were some flyers with this pellet.
Skenco Big Boys gave this nice 0.43-inch group. The group is almost twice as wide as tall.
The 13.4-grain JSB Monster also produced a 0.43-inch group.
The Crusader really liked the 8.4-grain JSB Exacts, as this round 0.24-inch group shows.
Best accuracy came from the Beeman Kodiak pellet. This group above is just 0.23 inches.
Adding it all up
Why buy a Crusader? After all, it costs just over $1000, and that price will keep many away. Compared to a Beeman R1, the size and power are identical. The R1 has a better trigger, but the Crusader has a better firing behavior due to the gas spring. The Crusader also has a far nicer stock, better metal finish and includes a factory muzzlebrake. Between my Crusader and my R1, the Crusader shoots more pellets accurately and will shoot slightly smaller groups, probably due to the fine Lothar Walther barrel. Unfortunately, the Crusader is more hold sensitive than my R1.
Both rifles should last a lifetime with proper care. It’s possible to upgrade an R1 with a new stock, a gas spring, muzzlebrake, etc., but you’ll end up spending more than the cost of the Crusader and still do not have the nice metal work. If you can afford it, the Crusader offers very good accuracy in a nicely finished package.
Theoben Production ceases
In October, 2012, Theoben Ltd. in England announced that they were entering liquidation (bankruptcy). It remains to be seen whether another company will take over production rights for Theoben springers.
