Posts Tagged ‘pellet seater’

Air Venturi Bronco with optional target sights: Part 4

by B.B. Pelletier

Part 1
Part 2
Part 3

You know how your wife buys a new trash can for the kitchen, and it doesn’t match the front of the old refrigerator that you’ve been talking about replacing for several years? So, you buy a new fridge, but you want this one to have an ice dispenser in the door; so, you hire a plumber to run the water lines; as long as he’s there, you decide it’s time to replace the chipped sink with a new stainless-steel double sink; but as long as he’s under there, you might as well have him replace the water supply lines and the waste pipes. Then, your wife doesn’t like how the new sink looks against the old green Formica counters, and she wants those granite countertops you’ve been promising her ever since you forgot your 17th anniversary; but the new countertops won’t look right on the old painted cabinets, so you decide on some Scandinavian teak cabinets with glass doors; and now the chipped dishes look out of place. [Note from Edith: This is hypothetical. It's not a true story about us!]

So, seven months later, the total bill for the new trash can comes to 70 thousand dollars? Well, that’s what I seem to have gotten into with the Air Venturi Bronco. I was just testing the new Bronco Target Sight kit on the rifle, and I raked back the compost pile a little too far. So, today, you’re going to benefit from my puttering gone amuck.

I took a lot of heat from you guys in my last report. You didn’t like how I did things, plus I introduced the new Air Venturi Pellet Pen and PellSet and called it maccaroni without any warning! Well, shame on me!

I began today’s test by mounting theĀ Hawke 4.5-14x42AO Sidewinder Tactical scope on the rifle. The Bronco has a hole for a vertical scope stop pin, so I was able to anchor the two-piece mounts rock-solid.

I thought I would back up just a bit and see just what the best pellet is for this rifle, and then see if there’s a difference between seating that pellet flush and seating it deep. I started at 10 meters with five-shot groups, just to weed out the pellets that were not worth pursuing. They were all pretty good, but the lightweight Air Arms Falcon was just a bit better than the rest.

I realize that this is a test of a peep sight, but my last report raised some questions about the rifle’s accuracy that I felt needed to be laid to rest before the test was continued. I’m validating the rifle before I continue reporting on the new sight.

Then, I backed up to 25 yards and shot two 10-shot groups. One was with the pellets seated flush with the end of the breech, and the other was with the pellets seated deeper, using the PellSet. Let’s look at my results before I analyze them.


Ten Air Arms Falcon pellets seated flush with the end of the barrel went into this 25-yard group that measures 0.531 inches. The group is reasonably round.


Ten Air Arms Falcon pellets seated deep with a PellSet made this 0.821-inch group at 25 yards. Nine of the ten pellets went into a group measuring 0.564 inches.

Conclusions?
Looking at both the shape and size of these groups, I would be tempted to say the flush-seated pellets shot best. And there’s no doubt that this Bronco can shoot. But let’s not make up our minds just yet.

See that “flyer” in the deep-seated pellet group? It wasn’t a called flier. The hold and release were perfect. There is no reason that pellet should be that far away from the rest of the pellets at 25 yards.

What I’m not showing you are some other 10-meter groups with different pellets that also had strange fliers like this one. I had removed both the front and rear sights, so we can’t blame the front sight screws for being too long. But something is happening with this rifle that’s unusual.

Edith questioned me in the same way that I know the rest of you are going to question me. Didn’t I have good groups in the past? Why is this rifle suddenly shooting like this?

I went back and looked at the groups I shot in Part 3 of this report. If you do the same, you’ll see a couple “fliers” in those groups, as well. The difference is that those groups were shot at 10 meters instead of 25 yards.

So, then I went back to the 7-part report I did on the Bronco and examined those targets. In Part 5 of that report, I shot the rifle with a scope at 25 yards and guess what? There are “fliers” within some of the groups.

What’s happening?
I think the Bronco I’ve been testing is extremely accurate, but it has also been throwing fliers like this all along. I chalked them up to my poor shooting instead of something else. Now that I’ve examine the rifle under the microscope, I’m not so sure it was me. I think this rifle has been tipping pellets all along. It’s only when the gun is fired at 25 yards that this becomes evident.

I think this has gotten worse recently, but I cannot say with certainty what’s causing it. It’s clear from the two groups shown here that the rifle can really shoot, but I think it can do even better than it currently is.

I have a plan to try to remedy this situation; and, at the worst, it will not affect the accuracy of the rifle. But if I succeed, this rifle could shoot smaller groups than you see here.

I need to try my remedy before returning to finish the report on the peep sight kit, because I think it has been affecting the results. And there’s a second problem I’ve identified with the peep sights that has nothing to do with the sights, themselves, but with how I’ve been sighting the gun. I’ll describe that problem in detail for you and tell you how to easily avoid it.

Til then!

Air Venturi Bronco with optional target sights: Part 3

by B.B. Pelletier

Part 1
Part 2

Today is the day you find how I improved the accuracy of the Air Venturi Bronco rifle I’m testing with the Bronco Target Sight kit. I asked you to guess what I did to get better groups, but only Fred of PRoNJ got it right. I thought this would be a straightforward test and that one range session was all I needed for this rifle. After all, I already did a 7-part report on the gun, so there’s been plenty of time to get to know how it shoots. In fact, I even installed a Williams peep sight on the gun, so I even know how it shoots with that. This was just supposed to be a test of the Bronco Target Sight kit and nothing more. But man plans, and God laughs!

Yesterday, I told you about the front sight screws and the barrel that obviously needed cleaning. Afterwards, I was not rewarded with those perfect groups I’d anticipated. The groups I got were better than before the rifle was cleaned, but they were still bad for an accurate rifle at 10 meters off a rest. Something else was needed.

The artillery hold
How many of you guessed that the secret to good shooting was the artillery hold? Guess again, because I saw no difference between resting the rifle on the flat of my palm and on the backs of my fingers.

One thing I did rediscover was the need to hold the Bronco absolutely “dead” in my hands rather than with any tension built in. For its power level, the Bronco seems to be on the twitchy side as far as hold sensitivity goes. So, before you shoot, it’s imperative that you relax all the way and allow the rifle to settle in wherever it wants to. Then, you have to shift your hands and body until it settles in with the sights very close to on-target.

But that wasn’t the secret I was looking for because the groups were still on the large side. Then, something cool happened. As you know, my friend, Mac, has been visiting us; and while he was here, I got a couple spring-piston air rifles to test before they come to market. I’ll be starting some reports at the end of this month, so I asked Mac to test the rifle while I worked on other things. It’s never difficult to get him to test a brand-new airgun!

One of the pellets he selected to test the rifles with was the venerable RWS Hobby, which is the lightest all-lead pellet around. Hobbys are often among the most accurate pellets for spring-piston airguns, and they did really well in these new rifles, so his choice seemed obvious. Since the Bronco is also a spring-piston gun, I wondered if Hobbys might do well in it.

Did Hobbys shoot better?
Yes, they really did. They gave groups that were in the ballpark for the rifle as it was now performing with the clean barrel, but they weren’t the groups I’d hoped for. But something drove me to continue to shoot them. I guess I was thinking about the pellet seasoning effect we talk about. As I was shooting, another thought popped into my head.

Two years ago I was testing a Hy-Score 801 — a Belgian-made breakbarrel spring-piston air rifle that has a pellet seater built into the gun. It sits above the breech and swings down to push the pellet deep into the breech. When I tested it, the seated pellets increased in velocity by 100 f.p.s. and also grouped closer. Could that same thing be true for the Bronco, I wondered?

Well, it didn’t take much to test the pellet-seating theory, because I’ve been testing the Air Venturi Pellet Pen and PellSet for some time. But this was the first time I had occasion to use the adjustable PellSet tool to push a pellet into the breech of an air rifle! Until now, I’ve always used a Bic pen, but this new tool is adjustable so I can control the depth to which each pellet is seated. And once the tool’s adjusted, every pellet gets seated to exactly the same depth. Consistency is paramount to accuracy, so that’s very important.

Success!
The moment I began seating the pellets deeply with the PellSet tool, the groups shrank to an acceptable size. It looked like a television infomercial, because the difference before and after was night and day. I shot another group but didn’t seat the pellets. I held the rifle as carefully as I had when the pellets were seated deep, just to eliminate any bias. I’m not saying there still isn’t some bias in my testing, but the results of seating the pellets looks very promising!


This PellSet tool is an adjustable pellet seater that hangs around your neck and seals each pellet to the correct depth in the breech. Using it immediately tightened the Bronco’s groups!


When you load a pellet manually, you seat it flush with the breech like this.


The PellSet tool enables you to seat each pellet to the same depth in the bore. The tool is adjustable so you can fine-tune it.


Ten RWS Hobby pellets seated flush with the end of the barrel grouped in 0.916b inches at 10 meters. While not a great target, this demonstrates that the Bronco wants to shoot Hobbys well, because 8 of the 10 pellets made a group about half the size of the large one.


When the Hobbys were seated deep into the breech, they grouped into this 0.72 inch group. This is much better than the first group and clearly shows what deep-seating can do. But notice there’s still one flier in this group.

When I saw the difference between the deep-seated and flush-seated pellets, I believed I was on to something. But one result doesn’t make a conclusion, so I shot another two groups. This time, I was very careful with each shot to apply the artillery hold correctly.


The second group of flush-seated pellets was tighter than the first, though not as tight as the first group of deep-seated pellets. Only a single flier this time. Group measures 0.845 inches between centers.


The second group of deep-seated pellets gave this 0.516 inch group. No fliers at all. This is the accuracy potential of the Bronco!

Conclusions
There was a lot to cover in this test. First: I found that the longer front sight screws do not present any problems as far as accuracy is concerned. That was a needless concern.

Next, I discovered that the barrel wasn’t just dirty — the bore was actually constricted at the muzzle. Cleaning the bore (but not with J-B Non-Embedding Bore Cleaning Compound this time) did improve accuracy, but not as much as I’d hoped. Something else was needed.

I had shot decent groups with this rifle in the past, so it is accurate. After cleaning the barrel, I almost got groups as good as before, but not quite. However, I’d been shooting 10 shots at 25 yards before and only five shots at 10 meters. Any direct comparison between before and now was impossible.

Switching to RWS Hobby pellets was good, though Hobbys may not be the most accurate pellets for this rifle. But by staying with them, I eliminated any other comparisons that might lead me astray. I also seasoned the bore, so no one can say that accuracy suffered from switching pellets.

Finally, I used a pellet seater, and not just any seater, but one that’s adjustable so I can set how deep the pellet goes. This tool has a lot of potential for improved accuracy in lower-powered spring-piston airguns, and I plan on using it in a lot of future tests.

Bottom line
The Bronco Target Sights are a nice addition to the rifle and far less expensive than any alternatives. A scope would work well, too, but for those who like iron sights, this sight set might be the best way to go.

Haenel 311 target rifle: Part 2

by B.B. Pelletier

Part 1


The Haenel 311 is the world’s only bolt-action, spring-piston 10-meter target rifle.

Let’s look at the velocity of my Haenel 311 target rifle. Because of the way it cocks, this rifle is low-powered. It isn’t possible to put a long-stroke piston or a stout mainspring in the mechanism when the rifle is cocked by pulling back on a three-inch bolt handle. You don’t pull it straight back, either. The base of the handle pivots like a fulcrum, and the handle rocks back to pull the piston into the cocked position. As I mentioned in Part 1, it’s so difficult to cock that the gun is destined for adults, only.

However, a short piston stroke and a weak mainspring combine to give very low velocity. Since this is a target rifle, velocity doesn’t matter. But this wouldn’t be the gun to choose as an all-day plinker. Get a Diana 27 for that, or any one of the Haenel breakbarrels. Save the 311 for its intended purpose.

If it sounds like I’m making excuses for the gun, that’s not what I want to do. I just want the reader to understand it in the right context.

Since this rifle has a leather piston seal, I dropped several drops of oil into the loading tap, then closed it and stood the rifle on its butt for several days before this test. For those who are new to airgunning, leather seals need lots of oil to do their jobs. Synthetic seals need a lot less oil, and it needs to be silicone chamber oil so it won’t detonate with the high heat it can generate.

In a rifle of the 311′s power, you can use plain old household oil for the seals, because the rifle doesn’t generate that much heat. But using silicone chamber oil won’t hurt anything, so that’s what I used. And there’s one additional reason for oiling the gun before shooting. The loading tap has to have some clearance to be able to move and do its job. When you oil the gun at the tap, some oil gets on the tap itself and helps to seal it when the rifle fires.

Velocity test
A note to the new reader. I test rifles with a range of pellets appropriate to that rifle. There will be a weight spread among the pellets I use, so you can gauge the power of the gun from what I use. But bear in mind that some pellets will work better in certain guns and the lighter pellet won’t always be the fastest. I also won’t test a gun with a pellet that I deem inappropriate for the gun, such as Beeman Kodiak heavyweight domed pellets for this target rifle. For a 10-meter target rifle, I’ll test with wadcutters since they’re the only pellets that are legal to use in a 10-meter match.

Let’s get right to it. The first pellet I tested was the Gamo Match wadcutter. This pellet used to be a viable and inexpensive pellet for target guns, but the design was changed a few years ago. While it’s still inexpensive, it doesn’t perform as well as it used to in many guns. Still, I thought it was worth a try.

This pellet averaged 462 f.p.s., but the spread was quite high — going from 439 to 479 f.p.s. At the average velocity, the rifle puts out 3.66 foot-pounds with this pellet. The wide velocity spread makes me think this one won’t be that accurate, but we’ll see.

Next I tried RWS Hobby pellets. At just seven grains weight, they should be among the fastest lead pellets in this rifle. Hobbys averaged 490 f.p.s. in the 311, and the spread went from 478 to 497 f.p.s. That’s tighter than the Gamo Match. At the average velocity, the energy developed at the muzzle was 3.73 foot-pounds. Sometimes, Hobbys are very accurate in certain guns and are worth trying in this one.

The last pellet I tried was the H&N Finale Match Pistol pellet. At 7.56 grains, you’d think they’d be slower than the Hobbys that weigh a half grain less, but these pellets averaged 492 f.p.s. in the 311, and the spread went from 480 to 501 f.p.s. They’re clearly faster and more efficient. At the average velocity, they produce 4.06 foot-pounds of energy at the muzzle.

Seeing the efficiency of this pellet gave me an idea. What if I used a pellet seater to iron out the skirts of this pellet? What would happen to the velocity then? I say that because a taploader tends to allow some air to blow past the pellets before they’re blown into the bore. Enlarging the skirts is a possible way to minimize this.

I tried enlarging the pellet skirts with the ball end of a pellet seater. However, the results surprised me. Instead of boosting velocity, this knocked it back to an average 474 f.p.s. for the H&N Finale Match Pistol pellets. However, the extreme spread ran only from 472 to 478 f.p.s., so the overall velocity was a lot tighter from shot to shot.

The bottom line is that the Haenel 311 is a target rifle and nothing more. Because of the design, there’s no way to soup it up for greater performance; and as I noted in Part 1, this is a rifle you want to stay out of.

Next time we’ll look at the accuracy of this Cold Warrior.

Walther PPQ/P99 Q CO2 pistol: Part 3

by B.B. Pelletier

Part 1
Part 2


Walther PPQ/P99 CO2 pistol

We’re going to finish the Walther P99 Q air pistol today with accuracy tests of both pellets and BBs. Several readers suggested that the double-action only trigger-pull would lead to larger groups, and I have to admit I thought so, too. A DAO pistol can be made to be very accurate, but it entails gunsmithing of the trigger that costs many times the price of this pistol. As they come from the factory, there are but a few DAO pistols, whether they’re air-powered or firearms, that have what I would call decent triggers.

Trigger
The P99 Q trigger is one that “stacks” as it approaches the release. Much like a Colt revolver of the 1920s, the trigger-pull increases in weight dramatically just before the sear releases the hammer to fire the gun. Smith & Wesson found a way to overcome this and as a result they surpassed Colt as the world’s premier maker of revolvers before World War II. The stacking invariably causes the shooter to pull shots to the side opposite the shooting hand. A right-handed shooter will pull shots to the left while a lefty throws them to the right. This can be overcome with a lot of training, but it has to be practiced all the time, or you’ll revert to pulling your shots.

I’d earlier estimated the trigger-pull at 12 lbs.; but after firing about 100 careful shots, I have to say that it varies between 12 and 15 lbs. I had to use two fingers to keep from throwing my shots. That’s one finger on either hand, as shooting this gun was a two-handed proposition.

Lighting
Having learned some lessons when shooting the Bronco with open sights and reading glasses last week, I was able to shoot that same way for this test without any problems. Instead of using a 75-watt shop light, I illuminated the target with a 500-watt quartz lamp that defined the bull very well. The rear sight was also sharp against the bull, and I don’t think I gave away any accuracy.

Shooting position
I shot from a standing strong-side barricade position for the whole test. That means I used a support to steady my right hand while shooting. I was standing for all shots and the pellets were shot at 25 feet, while the BBs were shot at 20 feet.

The P99 Q isn’t a target pistol, and we shouldn’t think of it that way. It’s a plinker and an action air pistol with minute-of-pop-can accuracy at 20-25 feet. If I could show that to you here, I would. But for this blog paper targets still work best.

Accuracy
I first tried RWS Hobby pellets. They turned out to be a very good choice, but I had to shoot about five clips before I found the best way to shoot the gun, so the first targets of Hobbys only hinted at what they might do. Once I was using two hands with two fingers on the trigger, I was able to lob pellets into a fairly tight group that was only limited by the gun’s slow gas flow.


This is a good group horizontally, but variations in velocity made it string vertically. Shots were fired in intervals of five seconds or less. Group measures 1.801 inches between the widest centers.


When I waited a minute or more between shots, the CO2 gas had time to flow through the small pierced hole and into the valve, making velocity a more stable thing. These Hobbys went into a group measuring 1.191 inches between centers.

The next pellet I tried was the JSB Exact RS, a domed pellet weighing 7.3 grains. They shot tantalizing groups with but a few strays, and I thought I was onto something, but no matter what I did I couldn’t get all the pellets to go to the same place.


This is a perfect illustration of what the JSB Exact RS pellets were doing. Five went into a tight group, but three strayed out for no obvious reason. Group measures 2.43 inches between centers.


Again, the JSB Exact RS domes were tantalizing. The dark smudge on the target is a black bull drawn on the back for a different project. The felt-tipped pen seeped through the paper to make the smudge. One shot is in the darkest part of the smudge, and the hole at the lower right has two pellets. Group measures 2.055 inches between centers.

I did try other pellets like Gamo Match and JSB Exact 8.4-grain domes, but they were not as accurate as these two. Now it was time to switch to BBs.

Several readers correctly predicted that BBs would not be as accurate as pellets in the pistol, and with what we know about the situation, I’d have to agree. Not only are BBs round and made of steel so they cannot be spin-stabilized in flight, they’re also smaller than pellets and therefore do not fit the bore as well. There’s no way they’re going to be as accurate. As I mentioned in the beginning of this report, I moved up from 25 to 20 feet for BBs because I wanted to keep them all on the target paper.

The first to be fired were Crosman Copperhead BBs. They fit the BB clip (loading from the front, only!) very well and functioned perfectly.


Crosman Copperhead BBs made this 3.782-inch group at 20 feet. This was shot with the same two-hand hold described for the pellets, above.

Next, I tried some RWS Match Grade BBs that Pyramyd Air does not carry. They were a tighter fit in the clip and produced a smaller 8-shot group. Both BBs seemed to group to the same relative place as pellets, though with much larger distributions.


The RWS BB was more accurate, grouping eight in 2.996 inches at 20 feet.

Summary
Well, that’s it for the P99 Q. There were no malfunctions during the test once the pellet-seating tool was used. The gas flow problem I describe in this report is an issue if you want to fire the gun fast, which is what action pistols are designed for. Backing off on the piercing screw seemed to work when I let the gun rest for at least 10 seconds between shots, but shooting faster than that knocked the velocity down in a noticeable way.

This is a fine action pistol for the price. Considering that it accepts both BBs and pellets, it’s very accommodating. Buy it for fast plinking fun, and you’ll be getting a lot for your dollar. Just remember that it’s a double-action only pistol, so you’ll need a strong trigger finger.

Walther PPQ/P99 Q CO2 pistol: Part 2

by B.B. Pelletier

Part 1

Announcement: Pyramyd Air has just introduced the Big Shot of the Week on their facebook page. The rules are pretty simple (post a picture of yourself with an airgun or airsoft gun), and you’ll have a chance to win a $50 Pyramyd Air gift card.

I said last time that I would definitely talk about the trigger on this DAO Walther P99 Q air pistol and that time has come. When the pistol is functioning correctly, the trigger offers a smooth pull of about 12 lbs. However, the “functioning correctly” part can be a problem if you don’t load the clip the right way.

Don’t need no stinking manuals!
I began the test poorly, by assuming that I knew how the gun operates. Of course, I didn’t read the manual. And trouble came with the first clip. One good shot was all I got, followed by the remainder of the clip needing a trigger-pull in the neighborhood of 25-30 pounds. I opened the slide to see if something was jammed and there it was. One pellet had backed out of the clip and was now deformed from being dragged through the mechanism against its will. So, I loaded a second clip and started over.

Again the gun tied up after the first shot, so I went to Edith and complained. She told me she had read about the Walther Lever Action rifle when she put the description on the website and that the pellet clips were supposed to be loaded using a special tool. Well, I had no special tool, since the pistol didn’t come with one, but a few days later the Walther Lever Action rifle arrived and it did have a pellet-seating tool.

It works!
The special tool works as advertised — big surprise. All it is is a plastic pusher that forces each pellet into the clip deep enough that the ridges on the sides of each chamber bite into the thin lead skirts. That is enough to hold the pellets in place until, they’re fired.


The seater is just a piece of formed plastic. Notice that one pellet is seated deep while the other one is flush with the end of the clip. The flush one will probably back out and tie up the gun.

The manual also advises that the BBs have to be loaded into their black plastic clip from the front end of the clip — which is the side without the ratchet.

Gas use — I learned something important!
Let’s start the test. First, I seated 8 RWS Hobby pellets in the clip and chronographed them. They averaged 320 f.p.s. with a velocity spread from 301 to 338 f.p.s. But I also noticed two very important things when shooting these pellets. First, every velocity was lower than the one before it, even though I allowed the gun 10-20 seconds between shots to warm up. With CO2, if the gun gets too cold from shooting too fast, the velocity will drop off, but allowing 10-20 seconds between shot is more than enough recovery time, especially since I was shooting in a room at 70 degrees F (21.1 degrees C).

The second thing I noticed was that, if I allowed a full minute between shots, the velocity would be back up where it was on the first shot. Let’s tuck away that information for a moment and move on to the next pellet — but we’ll come back to it.

The next pellet tested was the Beretta Target pellet that Pyramyd Air no longer carries. It is a 7.9-grain wadcutter made from pure lead. It shouldn’t be as fast as the 7-grain Hobby, but it was. These pellets averaged 318 f.p.s. with a spread from 309 to 326 f.p.s. Again, each shot was slower than the one before, unless the wait time was a minute or more.

That made me think of a day on the set of American Airgunner when we had a certain pistol that shot slower with each shot, but would restore full power after a minute or more in-between. The problem there and probably here as well was a cartridge that hadn’t been pierced as deeply as it should be. So, I backed off the piercing screw (used to tighten the cartridge against the piercing pin) about one-eighth of a turn until gas began to escape, then I tightened just a little to stop it. Now there was more room for the gas to flow if I was right about what was happening.

Next up were some old 7.5-grain Gamo Match pellets. They averaged 330 f.p.s. with the new CO2 cartridge arrangement and the spread went from 319 to 344 f.p.s. Clearly, the pistol was now shooting faster, so I re-tested the RWS Hobbys and they now averaged 330 f.p.s. with a spread from 320 to 343 f.p.s.

The lesson here is that CO2 is a very large molecule that needs lots of room to flow. The next time you pierce a cartridge, try to back off the screw a little, if that’s possible.

BBs are next
The P99 Q is also a BB pistol, so they got tested next. First up were some Crosman Copperhead BBs that averaged 330 f.p.s. The spread went from 319 to 344, so no advantage to the lighter weight of the BBs. The gas blowby in the bore must be offsetting any small gain.

I also tried the RWS BBs . They averaged 328 f.p.s. with a spread from 281 to 339. I cannot explain the lone reading of 281 except it was there. All these BBs fit the clip tighter than the Copperheads.

So far, this little pistol is doing fine. Just as long as the pellet seater is used and you load the BBs from the front, everything functions well. The trigger is heavy, but I should be able to get good accuracy if the pistol is capable of it.

Accuracy is next.

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