Posts Tagged ‘JSB Exact Diabolo pellets’
by B.B. Pelletier
Yesterday, I told you that today’s test was coming; but because I needed to mount a scope for this test, I was prompted to also test the UTG 3/8″ dovetail-to-Weaver/Picatinny rail adapter. There was some interest in this adapter; so I’ll continue to test it with other airguns so we get a good look at the performance. Today, I want to do Part 4 on the Crosman 2100B multi-pump that I promised back in March.
I reread Part 3 of this report to see which pellet(s) did well at 10 meters. From what I see, only 7.9-grain Crosman Premiers did well in that test, so I added a couple pellets I had not tried before to today’s test.
The scope I used is an Osprey 2.5-10×42 that has its parallax fixed at 100 yards. It’s a firearm scope, pure and simple. At full magnification, the target was fuzzy, so I set it to about 5.5x for this test. It has a duplex reticle with mil-dots on the vertical reticle, which is about medium thickness. The optics are very clear, and I think the gun got all the help it needed from this scope.
For the 10-meter test, I pumped the rifle 5 times for every shot. Today, I’ll be shooting 25 yards. Now that it has a scope mounted, pumping is more difficult because I cannot hold the gun at the optimum place, which is on top of the receiver. The scope is in the way, and don’t you dare try to pump the rifle while holding onto the scope! Your hand has to hold the gun farther back, which winds up being the pistol grip of the stock. That isn’t the best leverage to pump the rifle, but fortunately the 2100B has a short, easy pump stroke.
For today’s 25-yard test, I pumped the rifle 6 times for every shot. My thought was to shoot the rifle 5 shots with each pellet and see if it was accurate enough with that pellet to warrant the work of shooting the second 5 shots. This would also tell me whether the shots were walking because the bore needed to be seasoned with each new pellet. As it turned out, though, all three pellets were worth the effort to shoot a full 10-shot group, so that’s what you’ll see.
Crosman Premier lites
The first pellet I tried was the 7.9-grain Crosman Premier dome. The first 5 shots seemed to group okay — about what I expected from the earlier results at 10 meters — so I just kept on shooting and finished the 10-shot group. Ten shots landed in a group measuring 0.809 inches between centers. The group is a little wider than it is tall, but you’ll notice that 9 of the 10 shots are actually in a group that is fairly round.
This was better accuracy than I expected, based on the results of the 10-meter test. The group size there was 10 Premiers in a 0.539-inch group; and, at over twice the distance, the group only opened another three-tenths of an inch. I think that demonstrates how much greater accuracy is provided by a good optical sight.
The pace of shooting is slower
One thing about shooting a multi-pump is that everything slows down. It takes a while to make each shot ready, which is similar in concept to shooting a muzzleloading rifle that has to be loaded separately with powder and ball. That slower pace forces the shooter to concentrate more on what he’s doing — or at least that’s how it affects me. That’s why I like single-shot rifles so much — for what they bring out in me.
The second pellet I tried was the RWS Superdome. This 8.3-grain domed pellet is one I don’t try too often — for no particular reason. It’s made from pure lead and has a relatively thin skirt that takes the rifling very well. I really didn’t know what to expect from it, but it’s different enough than a Premier lite that I wanted to see how it might do.
Ten Superdomes made a rather open group that measures exactly the same as the group of Premiers — 0.809 inches between centers. It looks like a larger group, and there’s undoubtedly some error in the measurement of both groups, but I cannot discern any difference between them with the dial calipers.
H&N Baracuda Greens
The last pellet I tried was an afterthought, based on the success of the other day. H&N Baracuda Greens made such a great initial showing that I thought I would include them in this test, just for fun. Boy, am I glad I did!
I was unable to see the pellets that landed inside the black bulls because of the parallax setting of the scope, so it wasn’t until I walked downrange to retrieve the target that I saw what the Baracuda Greens had done. Ten went into a group that measures 0.48 inches between centers! Not only is this the best group of this test, it actually outshot the M4-177 I tested at the end of 2011. That’s Crosman’s other hot, low-cost multi-pump, so don’t get it confused with the MAR177 PCP. That kind of performance says a lot about this air rifle and the accuracy that it offers for very little money.
This will be the last time I look at the 2100B, but it’s been an interesting test. After Part 3, I didn’t think the gun had much more to show us — but this final accuracy test changes everything.
We’ve looked at a fine multi-pump air rifle in addition to the UTG scope ring adapters that let you use Weaver rings on an 11mm airgun dovetail. They proved very easy to install and worked exactly as advertised in this test.
And the Baracuda Green gets another pat on the back. This is a pellet worth considering when you search for the best ammo.
All things considered, I would say this was a fine end to the test of a really great and also inexpensive air rifle!
by B.B. Pelletier
Blog reader J was alert and noticed that I had not yet done the accuracy test of the Crosman 2100B multi-pump. I was astonished to find that he was right, so today we’re going to look at it. But before we do, I want to show you something I did at the range last week. Some of you who have been reading for a long time will remember that over a year ago I was suffering from eye problems. It turns out that my diabetes had dehydrated me so much that my eyesight was affected. And it took a long time for the situation to correct itself. I wondered if I would ever be able to shoot with open sights again.
This past Thursday, I was out at the range testing several firearms and airguns and a friend of mine happened to bring his Remington RangeMaster model 37 .22 rimfire target rifle for me to try. The model 37 was Remington’s equivalent to Winchester’s model 52 target rifle until the model 40X was created, and it (the model 37) has the reputation of being incredibly accurate. My friend can no longer use open sights and is scoping all the rifles he intends to keep. But this one is a rifle he has owned for decades but never shot. It still has the factory non-optical target sights.
The Lyman 17A front globe has a post-and-bead like target shooters used back in the 1930s and earlier. You put the post at the 6 o’clock spot on the bull. With good eyes, this kind of sight is considered second only to a properly sized aperture front sight out to 200 yards, and world records have been set with it. But notice I said, “With good eyes.”
I shot it at 50 yards with Winchester Super-X high-speed ammo, which is hardly target ammo! When I saw the group made with five shots I was ecstatic, because it proves that I can still see good enough to use open sights. I stopped at only five shots because who wants to ruin a group like that? However, after an involved trade with my friend, I ensured many more years of shooting this 37, and eventually I will shoot 10-shot groups. That’s important for today’s report, because the Crosman 2100B has a square post-and-notch sight, and the front has a bright green fiberoptic bead.
Next, I tried my custom .17 HM2 that this same friend made for me on a Mossberg 44 US action. This rifle has a Leapers scope, so there’s an even better chance of hitting the target. This time, five shots went into 0.266 inches at the same 50 yards. I was on fire! Unfortunately, I haven’t yet mounted the scope on the FWB 300S, so I didn’t have that to test, but everything I shot that day went where I wanted. Since I couldn’t see the group through my scope, I knew it was a small one. And, once again, I chickened out after 5 shots. If I were reporting on the guns and shooting for the record, I would have shot 10 shots with each gun.
Five shots in 0.266 inches at 50 yards with a scope. Not that much better than open sights. It looks better because the .17-caliber bullet is smaller, but the actual size of the group isn’t that much less than the first group.
On to today’s test
I decided to begin shooting pellets with the 2100 at 10 meters. That way, if the rifle proved somewhat inaccurate, I could still keep them inside the trap. The 2100 has a .177 rifled barrel, so pellets should be more accurate than the steel BBs it also shoots. Since this is a Crosman rifle, what better to begin than with 7.9-grain Crosman Premier 7.9-grain domes?
The first thing I did was oil the pump head with several drops of Crosman Pellgunoil. I did that for the velocity test, as well; but since it’s impossible to overdo this step and it does ensure the best compression, I did it again.
I decided on 5 pumps for this test because the velocity test showed that was enough to get all pellets into the 500 f.p.s. range. At 10 meters, that’s all you need for good results. So, this test was very easy on me.
A new way of loading
Many owners may already have discovered what I am about to share; but while I was shooting the Premiers, I discovered a foolproof way of loading them. The loading port on the side of the rifle is too small for most adult fingers, and until now I’ve found it difficult to load the pellet so the head points forward. But during this test, I accidentally discovered that I could drop in a pellet in any attitude and simply elevate the muzzle of the rifle with the receiver rotated to the left so the loading port is angled up. The pellet would then try to right itself at the bottom of the loading channel; and, if it wasn’t aligned, all I had to do was push it forward slightly with the cocking handle and then pull the handle back and the pellet would align itself every time. I tried this with the JSB Exact RS pellets, as well, but they got stuck and didn’t align as easily as the Premier lites. I can’t wait to try this method on my old Crosman 2200.
Sights are okay, but not great
I found the sights easy to acquire and very sharp and crisp, but the method of adjustment leaves a lot to chance. I never did get the group shooting where I wanted it. Also, though I elevated the rear sight nearly all the way, it was still just hitting at the point of aim at 10 meters. Forget about shooting longer distances unless you learn how to hold the front post above the top of the rear notch. But the sights are not important, because this will not be the last test of this rifle. Just like the M4-177 rifle I tested last year, I found the 2100B was far more accurate than the price indicated! In a word, it was phenomenal — which is why I told you about the state of my eyes in the beginning of the report.
Next, I tried the JSB Exact RS pellet. I was expecting to see a similar group, which is why what I got surprised me so much.
What a difference! Crosman could use this as an ad testimonial for Premiers, if they wanted. We all know that the JSB Exact RS is a premium pellet; but in this rifle, the Premier lite is the clear and obvious choice. I already demonstrated that my eyes are up to the task, so there’s nothing to blame in this case but the pellet.
After testing two pellet brands, I switched to Crosman Copperhead BBs and fired 10 from a standing supported position at 22 feet. If the group was small, I would then try other brands of BBs, but as you will see that wasn’t necessary.
Ten Crosman Copperhead BBs went into this 2.219-inch group at 22 feet. This demonstrated that it wasn’t worth pursuing BBs any further. My photo inadvertently cropped off a BB hole on the right of the group. It’s on the 5-ring, as it ends on the right margin.
This rifle is deadly accurate with Crosman Premiers and not very good with BBs. I wouldn’t even bother with BBs in the 2100 anymore because I have a host of BB pistols that will out-shoot it. But with Premier lives, it’s a different story.
The 2100B has earned the right to a special 25-yard test with a scope sight. That will come in Part 4, and I charge blog reader J with making sure I don’t forget to do it!
by B.B. Pelletier
Today, we’ll look at the velocity of the Crosman 2100B multi-pump, and a strange thing occurred during the test. Actually it was two strange things — one an amazing coincidence and the other just weird. Both relate to oiling the gun, and both will be informative.
First, the coincidence. As I was writing this blog (last week, because I’m in Las Vegas at the SHOT Show this week), I got a question from a reader whose 2100 wasn’t pumping air. I asked him if he had oiled the pump piston head like he was supposed to, and I directed him to the online owner’s manual that tells how to do it and to a blog I wrote years ago that tells the same thing. A couple hours later, I get a thank you message that he’s oiled the gun and it seems to be holding air.
So, there I am in my office pumping the gun and shooting it for velocity and I ask myself about the state of the pump piston head of the particular gun I’m testing. Sure, it’s brand-new, but that doesn’t mean that it has enough oil. I look, and the pump head appears to be dry. For those who wonder what I’m talking about, please read the manual.
Then, I recalled that someone had guessed that this rifle would shoot in the low 600s with lead pellets, because someone he knew had tested it. Lo and behold, it was shooting only about 622 f.p.s. on 10 pumps (which is the maximum) with Crosman Premier 7.9-grain pellets. Wow! He was right!
But, wait! The pump head was dry, so I oiled it with some Gamo oil for CO2 guns. The velocity jumped to 658 f.p.s. with the same pellets and 10 pumps. But after about 10 shots the velocity started declining again.
So, I oiled the pump head again — this time with Crosman Pellgunoil. The velocity jumped to 690 f.p.s. before sliding backward to the 620s.
What did I learn?
First, I re-learned for the umpteenth time how important it is to oil a multi-pump gun. That was all it took to fix the reader’s rifle! Second, I saw that the test 2100 rifle responds to oiling immediately, but falls off again almost as fast.
So, the published velocity of 725 f.p.s. can probably be achieved with real-world lead pellets for a brief time, but this test gun won’t hold that velocity very long. Maybe the material the pump head is made of needs a break-in period? I don’t know. What I do know is that I can change the velocity of this gun by 70 f.p.s. simply by oiling it.
It doesn’t end there, however. While that story was unfolding I was also experimenting with the speed of my pump strokes. Since the pump head seemed somewhat hard, I figured that faster pump strokes would build more pressure. And they did! I could increase the velocity by 10 f.p.s. at least, just by changing the speed at which I pumped. I’ve tried the same thing in the past with other multi-pumps, but this one is particularly sensitive.
I think the most representative method of testing this rifle for velocity is to let it sink back to its lowest velocity and stabilize there. That way, the velocity test will also represent the velocity at which the accuracy test is conducted, because I’m certainly not going to oil the pump head after each and every group! Undoubtedly, there’s sufficient oil in the gun right now because of the two oilings I mentioned.
The first pellet tested was the 7.9-grain Crosman Premier. Since the 2100 is a multi-pump, I decided to test each pellet and BB at 5 pumps and 10. That gives us a good picture of what the gun can do across the entire range.
On 5 pumps, Premier lites averaged 540 f.p.s. when the gun was pumped fast. They ranged from 537 to 543; and at that velocity, they produced 5.12 foot-pounds On 10 pumps, again with rapid pump strokes, this pellet averaged 630 f.p.s. The range went from 628 to 635 f.p.s., and the average muzzle velocity was 6.96 foot-pounds.
JSB Exact 8.4-grain dome
Next I tried the 8.4-grain JSB Exact dome. On 5 fast pumps they averaged 526 f.p.s., with a spread from 517 to 531 f.p.s. The muzzle energy averaged 5.16 foot-pounds. On 10 pumps, they averaged 608 f.p.s. with a spread from 595 to 611 f.p.s. The average muzzle energy was 6.9 foot-pounds.
JSB Exact RS
For a light pellet, I tested the JSB Exact RS. The name of this pellet includes the word Match, but they’re domes, not wadcutters, and cannot be used in formal match shooting. At 7.33 grains, they’re very light, yet I’ve had some good luck with them in other pellet rifles.
In the 2100, 5 pumps gave an average 559 f.p.s. The spread went from 555 to 563 f.p.s. The average energy was 5.09 foot-pounds. On 10 pumps, the average velocity was 646 f.p.s., and the range went from 635 to 654 f.p.s. At the average velocity, the muzzle energy was 6.79 foot-pounds.
So, the reader who said the 2100 wouldn’t get to 700 f.p.s. was right. As long as you don’t shoot it immediately after oiling with Pellgnoil, it won’t shoot that fast. But oil it, and it’ll probably top 700 f.p.s. with lighter pellets.
On to BBs
BBs were next, and with them things are much more standard. Though there are subtle differences in BB brands, they don’t vary as much as pellets. We’ll now see if the advertised velocity of 755 f.p.s is reasonable. Since this is a Crosman gun, I tested it with Crosman Copperhead BBs.
BBs are loaded into the large reservoir, then the gun is shaken and they fall into the smaller spring-loaded magazine. Once the magazine is empty, you can shoot pellets again, even though there BBs are still in the big reservoir; if they aren’t in the magazine, they won’t load automatically.
On 5 pumps, Copperheads averaged 570 f.p.s. They ranged from 564 to 578 f.p.s. At the average velocity, they generated 3.68 foot-pounds of energy at the muzzle. On 10 pumps, they averaged 678 f.p.s. and ranged from 672 to 682 f.p.s. That’s an average muzzle energy of 5.21 foot-pounds.
So the bottom line is that the test gun doesn’t meet its advertised spec for velocity. It falls at least 73 f.p.s. short. It does the same with lead pellets, so I’m withdrawing my remark that the gun is suitable for light hunting. Clearly, it’s below the safe margin. Yes, it will kill small animals, but I could not recommend it for that task based on these results.
I also note that the barrel is starting to loosen at the breech. It rotates slightly at this point, and I’ll keep an eye on it. And the pump lever hits the gun with a loud slap on every pump stroke — there’s no cushioning material to deaden the sound.
I hope these results don’t disturb owners of this gun, because they in no way condemn it. The accuracy test is still to come, and we might get a big surprise there.
by B.B. Pelletier
With the assistance of Earl “Mac” McDonald
Today, we’ll test the velocity of the Browning Gold. Mac is here and did the shooting for today’s test. He was surprised by the 45 lbs. of force needed to cock the rifle, just as I was; but by the time he finished the test, things were moving right along. So, you do get used to it.
Mac notes that the rifle fires briskly, which means with noticeable recoil but without excess vibration. It’s a solid feel. You could say it feels much like the old British-made Webley Patriot, though not as intense.
The trigger was a problem on the first gun that Mac tested, but in this rifle it’s fine. Of course, we’ll find out more when I test the rifle for accuracy because that’s when the shooter is forced into a close relationship with the gun. The trigger on this rifle breaks uniformly at 3.5 lbs.
Browning advertises the rifle at 800 f.p.s. in .22, which is stout and also right where you want it to be for hunting. I asked Mac to test it with three popular pellets, and I shot a couple rounds with a fourth just to see for myself how the rifle behaves.
The first pellet tested was the 14.3-grain Crosman Premier. Based on the advertised velocity, I expected to see something around 750 f.p.s. from this pellet, but the average was actually 729 f.p.s. That gives us a muzzle energy of 16.88 foot-pounds. Velocities varied from a low of 724 f.p.s. to a high of 733 f.p.s., so the total spread was just nine f.p.s. For a brand-new gun that hasn’t been broken in yet, that’s very consistent.
Next up was the JSB Exact Express 14.3-grain dome. Because this pellet is pure lead, I would expect it to go slightly faster than the hard-alloy Premier, but it actually went a little slower. They averaged 721 f.p.s. for 10, with a spread from 716 f.p.s. to a high of 731 f.p.s. The total spread was 15 f.p.s. At the average velocity, they generate 16.51 foot-pounds at the muzzle.
The last pellet tested was the old standard H&N Baracuda Match, which most of you know is the same as the Beeman Kodiak Match. In the Gold, they averaged 594 f.p.s., which generates a muzzle energy of 16.57 foot-pounds. The spread went from a low of 586 f.p.s to a high of 600 f.p.s., so the total spread was 14 f.p.s. Because the Baracuda/Kodiak is such a great hunting pellet, I’ll be sure to test it for accuracy.
And, lest you lament that an 800 f.p.s. rifle is shooting at under 600 f.p.s., welcome to reality. This has been going on for as long as there have been pellet rifles and it in no way disparages the Browning Gold.
But I know human nature, and there will be some readers who fixate on that 800 f.p.s. number, so I also tested it for a couple shots with .22 RWS Hobby pellets. At 11.9 grains, Hobbys are the lightest lead pellets around, and I always use them to test top velocities.
I fired three rounds that went 788, 778 and 783 f.p.s. So the rifle is spot-on where it is advertised to be; because, with a thousand-shot break-in, we expect it to increase by 20-30 f.p.s., at least.
Like Mac, I also found the gun to be authoritative but not overbearing. It’s not one bit like a long-stroke Chinese spring rifle that is shooting for the sound barrier. I noted that stage two of the trigger is long and a little creepy; but as I said in the beginning, the accuracy test will bring that out all the way.
Impressions thus far
At this point, I still think the Gold is a rifle that needs a proper break-in and will last. I wish I could say that cocking has become easier in the few shots we’ve fired thus far, but it hasn’t. However, the barrel lock is definitely smoother and lighter after these few shots. So the break-in continues.
by B.B. Pelletier
Photos and test results by Earl “Mac” McDonald
Anthony Stewart’s photo of his cousin shooting his Red Ryder is this week’s winner of the Big Shot of the Week. I’d say this boy really wants to shoot since it appears he’ll do whatever it takes to make a too-big gun work for him.
The Diana model 60, which is a Hy-Score model 810 in this case, is a breakbarrel target rifle from the 1960s and ’70s.
Today, we’re looking at the accuracy of the Diana model 60 recoilless breakbarrel target rifle. In Part 2, I also reported on my HW 55 CM, but now I’m back with the model 60 exclusively. All along, I’ve been baiting you with the incredible accuracy of this rifle. Today is the day we’ll see what that means.
We learned that Mac’s model 60 suffers from a loss of velocity over the factory specs. Blog reader Mike Driskill was kind enough to give us the velocities of his two model 60s. The first rifle is one that he suspects still has the original factory springs that came with the gun. It got a new piston seal back in 1999 from RWS USA. It shoots RWS Hobby pellets at an average velocity of 567 f.p.s.
The second model 60 is one rebuilt by Randy Bimrose, who commented that it was the hottest model 60 he had ever seen. That rifle averages 666 f.p.s with the same RWS Hobby pellets.
Mac didn’t shoot his rifle with Hobbys, nor did he test with any of the same pellets Mike did, but with H&N Finale Match Rifle pellets it averages 457 f.p.s. I will make an educated guess that his rifle might shoots Hobbys at 495-510 f.p.s., based on that performance. It’s slower than Mike’s slowest rifle and perhaps it has the original springs with an updated piston seal.
Velocity is not something we look for in a fine target rifle, but nobody wants their gun to be performing substandard, either. Mac still hasn’t decided what he will do about the gun, but I believe he will send it off to be rebuilt. Pyramyd Air is now fixing all Giss system rifles and pistols, so Mac knows where to send his gun to get it refreshed.
Back to accuracy — the sights
But today isn’t about velocity. It’s about how accurate this rifle is. I’ve made some strong claims for it in the past, so it’s time for me to show the evidence.
When we talk about accuracy, naturally the sights come into play. The Diana 60-series rifle sights are interesting and very well-built. Let’s begin with a look at the sight base that many of us have mistakenly called a scope base for years.
The Diana rear sight base has grooves running perpendicular to the axis of the action along the top of the entire sight base. To most of us, these look like an interesting but useless detail; but if you own a Diana peep sight, their real purpose springs into sharp relief.
The rear sight base on the Diana model 60 rifle has ridges that run perpendicular to the action of the rifle. They’re locking grooves.
The underside of the target sight has corresponding grooves that mesh with those on the sight base, locking the rear sight in position.
When you see the underside of the target rear sight, you see the corresponding grooves that bear down and intermesh with the grooves on top of the sight base, locking the sight firmly in position. One wonders why Diana never marketed scope rings with the same feature.
Yes, the model 60 is recoilless and probably doesn’t need its sight to be locked down, but the same sight base is found on their recoiling sport models made during the same timeframe. It’s easier to make the parts the same for all guns, so even the recoilless rifles get this locking feature.
Mac says he’s very intrigued by the level of sophistication he finds in the Diana target aperture sight. He took some detailed photos so I could share it with you.
This view shows the back of the rear sight, which contains both scales for windage and elevation adjustment. Both adjustment wheels have click detents that alert the shooter to exactly how far the sight has moved during adjustment.
The front sight accepts different inserts, like most target sights of that era. Mac discovered that it also accepts the clear inserts that have become very popular in recent years.
And now the targets
The proof is in the pudding, as they say, so let’s see how this target rifle shoots. First up was the venerable RWS Meisterkugeln, a time-honored wadcutter that has been around for most of the modern airgunning age. I used them back in the mid-1970s, and they’re still going strong today. Mac found them to be reasonably accurate in his rifle.
Next Mac shot the H&N Finale Match Rifle pellet. It grouped just about the same as the Meisterkugeln , though the group was centered on the target better.
So far, the rifle has shown accuracy that is average for a good 10-meter rifle. But next up was the JSB Exact Diabolos, a domed pellet that Mac uses for mini-sniping. The group these pellets shot was so small it was almost impossible to measure; but by being generous with the calipers, Mac estimates that it measures 0.10 inches between the centers of the two shots that are farthest apart. That’s the sort of accuracy seen in today’s top target rifles, so the model 60 gives away nothing to modern guns except ergonomics.
The bottom line
This report has been about a breakbarrel target air rifle that’s just as accurate as any fixed-barrel target rifle we see today. It proves the point that the breakbarrel system can be just as accurate as any other spring-piston system.
The report also reminds us that there are a lot of vintage airguns around that can be every bit as nice as they were 40-50 years ago when they were the latest technology. Fortunately, we live at a time when they are also repairable, so these vintage treasures can continue to serve us well in the years to come.
I’d like to thank Mac for taking the time to test his fine old target rifle and share the results with us in this blog.