Posts Tagged ‘Benjamin Rogue’
by B.B. Pelletier
Here’s what Andy says about his submission: Found this in the garage, it’s my dad’s old BB gun he got when he was 9. It needed a little work; but within an hour, I had it shooting good as new! It’s a Daisy model 30-30 Buffalo Bill Scout.
One of our blog readers mentioned the excellent book Yours Truly, Harvey Donaldson, and I purchased it. It’s a compendium of articles that Donaldson wrote for Handloader magazine, a few special articles he wrote for American Rifleman back in the 1930s and some correspondence he had with various notable shooting magazine editors. I found the book so interesting that I’ve already given two copies as presents to other shooters.
For those not familiar with the name, Harvey Donaldson is well known as a shooter, writer and developer of many wildcat cartridges — including his best-known .219 Donaldson Wasp. He was able to get 12,000+ rounds from a .220 Swift with each delivering in excess of 4,000 f.p.s. –and still group five shots inside a nickel at 100 yards. Today’s handloaders don’t have a clue or have forgotten about the knowledge men like this have given us.
Among the hundreds of treasures in this book, Donaldson makes the casual comment in one of his letters that Dr. F.W. Mann, who authored The Bullet’s Flight From Powder to Target, wasn’t a very good shooter. He also wasn’t a very good reloader. That’s why (according to Donaldson) Mann had to resort to his Shooting Gibralter concrete pier gun rest that weighed in excess of 3,000 lbs. and was sunk permanently in the ground. Donaldson says any good benchrest shooter could outshoot the groups Mann got using his rest.
That got me thinking. I have always thought of Dr. Mann as the penultimate shooter, and here is Harvey Donaldson, whose shooting credentials are impeccable, saying Mann wasn’t a shooter at all. He was a scientist.
Then it dawned on me. Some people like to shoot to see how well they can do, while others, like me, like to shoot to see how well the gun can do. Mann was obsessed with the quest to discover why all bullets do not fly to the exact same point of impact. He never discovered the reason, but along the way he did discover many things that we now take for granted:
1. Uniformity of the bullet’s base is extremely important to accuracy.
2. A bullet’s nose can be grossly deformed without affecting accuracy one bit.
3. The orientation of the rifle’s action must be consistent from shot to shot for the best accuracy.
4. A bullet can stray from the boreline in any direction on its way to the target and still hit the target exactly in the center.
Mann was an experimenter whose focus was on the gun and ammunition, rather than his own abilities. Not all shooters are like that.
Olympic and world-class target shooters tend to focus on their own abilities, to the point that they seem to assume the rifle or pistol they use is capable of perfect accuracy. Of course, they do test ammunition; but once they find what works, they buy it in quantity and concentrate on their own skills.
On the other hand, I tend to shoot from a bench more often than not. I want to see what the gun can do, and I’m not overly concerned about my own shooting skills.
In fact, I am just an average shot. If you were to plink with me, you’d soon discover that I can’t shoot any better than you and perhaps a lot worse than many of you. When I test an airgun for this blog, you don’t care how well I shoot. You want to know how well you can expect that gun to shoot. The benchrest takes as much of me out of the equation as possible and gives you a more objective picture of the gun’s performance.
Of course, you have to know how to shoot from a bench, and I have had lots of practice at that. Maybe I might seem like a good shooter to some people, but that’s only when I am as far removed from the shooting as possible. In truth, I am really a lot more like Dr. Mann, in that I’m more interested in the performance of the airguns than in my own ability to shoot.
But there are many shooters who are the opposite. They want to know how well they can shoot, and the rifle is just what they use to measure it. Of course, they’re aware that all guns are not perfectly accurate; and, yes, they do go through the same sort of search to find one that suits them best. Once they find it, all focus shifts back to their ability to shoot rather than whether or not that rifle can be made to shoot any better.
These shooters are not all shooting offhand, either. Some shoot from the prone position, others from the sitting position and many will take a rest wherever they can find it. Some of them even use crossed sticks as a portable steady rest in the field.
Let’s compare these people to our American 2x Gold Medalist Olympic champion rifle shooter — Gary Anderson. They first want a gun and ammunition they can trust; and after that, it’s all up to them and their skills with the gun.
Let me give you a couple variations on this theme to better illustrate what I’m saying. There’s the guy who receives his airgun and plops down in front of a chrongraph with a tin of pellets, first thing. For him, life is complete. He’ll sit there shooting thousands of rounds across the skyscreens as he inputs the results into endless spreadsheets of data to discuss on his favorite forum. He’s like Dr. Mann. He’s interested in one aspect of performance to the near-exclusion of all others.
The next guy buys the very same airgun and starts shooting it at targets immediately. He’s the guy who puts 80,000 shots on a gun and can talk about longevity issues that the rest of us will never live long enough to see. Where some of us live in the hopes of a good tuneup on our airguns, this guy has already performed four on his and has the parts on hand for the next two. To him, a tuneup is unavoidable downtime when he would rather be out shooting. He’s like Gary Anderson. He’s a shooter.
Another guy buys the same airgun and never shoots the first shot out of it. He tears it down and modifies it in ways that have either been recommended to him on the internet or that seem like the best way to go. Some of these guys have the rifle shipped to a certain airgun tuner and let him apply his magic before they ever set eyes upon their gun for the first time.
Then, there’s the guy why buys the same gun, sights it in with a good pellet and immediately starts hunting everything within sight. His gun is a tool, like his game caller and his rangefinder. He, too, is a shooter, but he doesn’t collect his shooting experiences as scores on targets, pictures of groups or numbers on a graph. Rather, he has an endless supply of memories of this hunt and that, what went right and what went wrong.
Does that explain it?
Does that, perhaps, explain why one shooter can be delighted with a rifle that shoots a certain pellet at 1,050 f.p.s. into a one-inch group at 30 yards and another cannot be satisfied until the same model rifle is tuned down to 850 f.p.s. and can put them all into a dime at 50 yards? Does it explain why a twangy firing cycle is so disturbing to one shooter, yet another can brush it off because the rifle puts them all where he wants them to go?
I am not saying that any of this is all one way and none of the other. But people do exhibit certain tendencies. Lloyd Sykes worked for years on the dynamics of an electronically controlled air valve, and now the world enjoys the Benjamin Rogue. Lloyd is a definite Dr. Mann. On the other hand, blog reader CowboyStar Dad tells us how many tens of thousands of shots he has on each of his guns. He wears out the mainspring in his IZH 61. He is a Gary Anderson-type shooter.
Knowing that these types of people exist may help us understand where someone is coming from when they ask a “simple” question…
Hi. I’m new to airgunning, and I would like to try out one of these new air rifles I keep reading about. I don’t want to spend too much money until I know that airgunning is for me, so can you make some recommendations of guns that cost under $300?
Yes, I can recommend some guns, but what do you want to do with one?
Person 1. I want to shoot tin cans and other targets around the manure pile. I have been shooting a .22; but there are some houses going in down the road, and I want to throttle back for safety.
Person 2. I’m fascinated by the thought of plain old air pushing a pellet to 1,400 f.p.s. I want to see what’s possible.
Person 3. My yard is infested with tree rats that I want to eradicate. After that, I plan on taking my show on the road and cleaning out the whole woods.
Person 4. I used to shoot target rifle on the ROTC team, and I’d like to get back into it but still be able to shoot at home because I don’t have a rifle range.
Leigh Wilcox, the founder of Airgun Express, used to say that airgun targets had to bleed, break or fall. Maybe they did for him, but I’m not ready to shoot at targets just yet. I’m still concerned why there is a twang upon firing and why my velocity is only 761 f.p.s. when others report over 840 f.p.s. from the same gun shooting the same pellet.
by B.B. Pelletier
I need to be humbled periodically to maintain my perspective on things. Fortunately, for me, I was created with many imperfections that make frequent humbling a certainty.
I was taking a .22 semiautomatic rifle apart several days ago to clean the action, and I got to the part where you remove the last drift pin and all the major and minor parts fly apart like a satellite that’s been hit by a particle beam. No chance to see where everything went because they all got disassociated at the same time.
When this happens, I have several mantras to address the situation. No. 1 is I imagine the item was assembled by a 19 year-old girl named Tiffany, while she is also talking to her coworkers, drinking a Slurpee and texting her best friend. Tiffany can put this thing together in 27 seconds and can spot (without thinking about it) when part 51b has been reversed in its slot, which is good because Tiffany isn’t really into thinking.
If that one fails and I still have parts lying all over the table, I think of Ishmael, who uses no special tools to assemble this item. He has a hole in one of the upright girders supporting the roof where he assembles these items all day long. It was blown through the steel girder 37 years ago with an acetylene torch, and it isn’t quite round; but time and use have polished the edges of the hole, and it’s the perfect assembly tool that was used by Ishmael’s father for the same purpose. With it, he can assemble a pallet-load of these things, whatever they are, before tea time.
When that one fails me, there’s only one thing left — the Machtar chant of assembly (see the movie Galaxy Quest). As it happens all too often, even this potent bit of magic refused to work, leaving me with a pile of parts that purportedly had once been a semiautomatic rifle. Had I not seen it in that condition, I would have doubted it.
I got the gun back together by scrutinizing each part and imagining the relationship it had with the other parts (see, mom, I can use that lump on my shoulders for something other than a hatrack!), but I hate it when that happens. Complex parts should self-assemble, like a wine glass filmed in reverse after shattering.
But this isn’t about me fixing a gun. It’s about me being humbled, so I’ll remember what it’s like to approach something new for the first time. Trepidation, you are my middle name!
So, when a Pyramyd Air customer asked for some pointers on the use of a chronograph the other day, I felt I had to spring into action. Here is his exact request:
I’ve read a good percentage of your BLOGs & articles (plus videos), but no-where do I see the distance specified to set-up a chrono for muzzle velocity for springer airguns, pistols & rifles. I use a ProTach Classic Chrono, with 36″ between “start” & “stop” sensors (originally for hand-loading). I’ve searched the net for an airgun industry std. (like for fire-arms), with no success. One article, on the net, said set the “stop” sensor @ 3 ft. from the muzzle ~ that’s impracticle!! How-about-it, B.B., Tom or Robert B.!! Rich
Where to place the start screen
Rich, if this was five years ago, I wouldn’t have a clue what to tell you. That’s because you’re coming from the world of firearms. I began using chronographs with airguns. Only very recently have I started using a chronograph for my firearms, and only recently have I learned the difficulties of figuring out where to place the start screen.
I typically place the start screen about one foot from the muzzle of the airgun. That’s almost ANY airgun, mind you, except for a big bore and one other exception I’ll mention in a moment. A couple months ago, while I was chronoing some centerfire handloads, I rediscovered why my Oehler 35P came with 15-foot cables. Even when the skyscreens are placed 10 feet from the muzzle, the muzzle blast from a .43 Spanish round will move them like a slinky in Shakeytown!
When it came time to test the Benjamin Rogue, I was prepared to move the skyscreens way downrange from the muzzle to keep from blowing them apart from the air blast. Even though the start screen was situated about 10 feet from the muzzle, the entire skyscreen assembly shook violently every time the rifle fired. So, I understand Rich’s question at the most visceral level.
Rich, a spring gun discharges only the tiniest fraction of pressurized air that a pneumatic puts out, so you can place the start screen a foot from muzzle of the most powerful spring rifle or pistol you can find, which would be a Whiscombe JW80 generating 32 foot-pounds in .25 caliber. Ain’t nothin’ badder than that out there (in spring guns, that is), and your chrono will never miss a beat!
CO2 guns — the other exception
CO2 guns, however, often have a visible exhaust that can fool the skyscreen. Whenever I chrono one of them, I back up about 18 inches from the start screen. This holds true for the weakest pistols as well as the more powerful rifles. You don’t get an incorrect number from them, at least not from my Shooting Chrony Alpha model. What you get is an error message that screen one, the start screen, was unable to detect the passage of the pellet accurately. Back up a few inches, and the problem is solved!
The rest of the smallbores
As far as the other smallbore air rifles and pistols are concerned, 12 inches is all the distance you need between the muzzle and the start screen. This holds true for a catapult gun throwing a 3-grain lead shot at 86 f.p.s. as well as an AirForce Condor belting out a .25-caliber 43.2-grain Eun Jin pellet at nearly 1,000 f.p.s.
Watch where you’re shooting!
A funny story that is directly related. Many years ago, I was running an M203 grenade launcher range for my company at Hohenfels training center, West Germany. The M203 is an underslung weapon that attaches to the bottom of the M16 rifle. It lobs a 40mm grenade out several hundred meters and has been called the hip-pocket artillery of the infantry.
Attached under the rifle, the M203 grenade launcher lobs 40mm grenades out to 350 meters. It uses special high-angle sights, which the firer must not forget to use!
Here’s the thing about the M203. It shoots only a few hundred yards, while the M16’s 5.56mm cartridge can shoot several miles. Naturally, the rifle shoots much flatter than the grenade launcher, so the grenade launcher comes with its own set of sights designed to elevate the weapon to a very high angle to get the needed range. If you were to use the rifle’s sights, the grenade would hit the ground just a few yards downrange — and that would be a bad thing.
This young man demonstrates the correct angle for the M203 grenade launcher.
The firing positions on the M203 range were simulated foxholes with bermed bunkers in front and on both sides of each shooter. These berms were made of railroad ties that held back mounds of compacted dirt. Each firing position was protected from the others so that if anything bad happened, only the one position would suffer the consequences. On this day, I found out why — to my chagrin.
Even though I briefed each relay of shooters before they went to the firing points about using the M203 quadrant sights and not the rifle sights, and even though each firing position had an NCO to watch the shooter, we had an incident where a shooter forgot and used his rifle’s sights to engage a target. The grenade came out of the launcher and hit the railroad ties that were about 12 inches in front of him.
No, he didn’t blow himself up. The designers of the M203 grenade anticipated this event (it’s fairly common) and made the grenade to be armed by spin. It has to travel a certain distance downrange before the centrifugal force of it spinning from the rifling arms it, and 12 inches isn’t far enough. After the range was called cold and evacuated, I went to inspect the firing position, where I found a crumpled grenade lying in the dirt, next to the abandoned weapon. Just from the sheer velocity of the projectile, the grenade had dented the railroad tie about two inches!
Bad things can happen
I won’t tell you how I fixed the situation, but my point is this — when the sights and the bore are not aligned at close range, bad things can happen. The same is true with chronographs! If you’re shooting into a pellet trap that’s three feet away and you sight through the scope, you’re going to shoot your chronograph because the bore is three inches below the scope. Don’t think you’re smarter than that, because everyone who uses chronographs shoots them sooner or later. By sighting through the scope, you’re almost guaranteed to put a pellet through the guts of the electronics package.
Instead, sight by instinct, looking at the orientation of the barrel relative to the target, and of course to the skyscreens. Do this both for the elevation above the skyscreens as well as for the line the pellet takes across both screens.
People sometimes place a chronograph downrange to calculate the terminal ballistics at a certain distance; or, if another chronograph is used near the muzzle, the ballistic coefficient of the projectile. But they forget that downrange the projectile can go wherever it wants. More chronographs have been ruined this way than any other. Figure that it is only a matter of time before the downrange chronograph is hit.
Lighting for a chronograph
The best light for skyscreens is an even light. A totally overcast day is perfect, as is a day with clear blue sky (as long as the sun does not shine directly on the skyscreens). But a day with puffy white clouds that move around is bad, and you’ll have to use the diffuser filters above the skyscreens.
For artificial light, incandescent bulbs that shine evenly are the best. Bulbs that shine by exciting either a gas or a phosphor, such as fluorescents, cannot be used. They will set off the skyscreens.
I personally have found that by reflecting a 500-watt incandescent light off a white ceiling, I get the optimum in indoor chronograph lighting.
Here’s a small lighting tip. Don’t use strobe flashes near the chronograph, because they will set off the skyscreens. So will the arc from an electric welding torch.
On the level
When you shoot through the skyscreens, it’s important to be as close as possible to perpendicular to the path of light to the screen. If you shoot on an angle — up or down doesn’t matter — the path through the screens will be longer than if perpendicular and the recorded velocity will be lower.
You’re in charge!
Most chronohraphs run on batteries. I should not need to say it, but always carry a spare for when the battery dies. It’s discouraging to be out on a range, only to have the battery die and not have a replacement — especially when the whole reason for going to the range was to use the chronograph.
A few chronographs use infrared sensors in their skyscreens and need infrared light sources in order to work. If you lose one of these special-purpose bulbs, all the bright lights in the world will not make up for it. Keep spares close by.
What about that neat little Combro chronograph that attaches to the muzzle of the gun? How good is it? Well, I once owned one and can comment. It does work and you do get a number from it. And whenever there’s a number, people stand around and believe it.
But here is the deal. Oehler, which is admittedly the leader in commercial chronograph technology, separates his skyscreens (the third one in the middle is the stop screen for a second channel that checks the other one) by at least 24 inches. The machine’s clock speed (the frequency at which the crystal oscillates) is four megahertz. While the pellet flies between the start screen and the stop screen, the oscillator is counting at the rate of four million cycles per second. At that rate, it can parse time into small packets. The Combro has screens that are only a couple inches apart and a clock speed they don’t publish, but which must be slower than the Oehler. The number you get from this device is at best a close approximation — a best guess.
Aside from that, the Combro uses IR sensors, will not operate well in strong daylight and is difficult to fit to the muzzle of the gun. If it’s misaligned when mounted, it can be hit by the projectile. It’s not suited to use with firearms.
I answered Rich’s question in one paragraph in this report, then I went on to discuss other common problems encountered when using a chronograph. If you have any other questions or would like to know more, please make a comment to that effect.