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Kral Arms - Imperium - IWA 2023

Dr. Kralenstein
Vetmx said:
Sold it to my buddy for $300. He was always an airgun guy but with cheap springers so I offered it to him. He almost didn’t buy it because he said it didn’t sound very powerful. One evening we were gabbing on my porch and a rabbit was down by my 100 yard spinners. I went in and grabbed that gun and said go ahead and try this limp noodle on that rabbit. Told him what reference mark in the reticle to use. Thump, flippity flop dead. He went down to his house and got me the $300. Since then he has taken some stuff out with it. Decent size stuff.
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That's funny. I followed that build thread and it's what made me buy the first jumbo I built and still have. I've had a few others, but that 25 cal I built is staying.
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Wonderful YouTube channel on airgun performance and accuracy

Troy Bakel
Ballisticboy said:
1 The Magnus, which I have already touched on.
2 Talking about the spin giving stability, there is more to pellet stability than just the spin.
3 Pellet lead is really too soft to wear out a barrel.
4 The spin stability will change the trajectory, both laterally and vertically.
5 Even without spin, a pellet will normally remain stable over long ranges, it is just not very accurate. This is why all aerodynamically stable ballistic projectiles are given some spin, to aid dispersion, not for stability.
6 The pellet is not affected by the rifling grooves after leaving the barrel. It is affected by the spin imparted by the rifling, which has a negative effect on the growth of yaw wave lengths and in spin drift, but the spin drift is caused by the gyroscopic yaw of repose and nothing to do with Magnus.
Each thing is minor on its own but taken as a whole they all build up to give a fake impression of how things work which take a lot of effort to put straight by other means.

This video is better than the one on BC's where even the basic equation for working out a BC is wrong. Both videos look like a random collection of information from various sources on the internet put together by AI or humans who don't know much, if anything, about the subject. It is a complex subject which is difficult to explain in simple terms, but that is not really an excuse for incorrect information in a video which is supposed to educate new shooters.
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The current trend is to go heavy and fast with little to no regard to the twist rate of the barrel, so before a diabolo even leaves the barrel:

hardairmagazine.com

Learn About How PCP Airgun Internal Ballistics Work

Internal Ballistics starts with a pellet at rest. When the gun is fired, air pressure acts on the base of the pellet, creating a force to accelerate it.
hardairmagazine.com hardairmagazine.com

www.everydaymarksman.co

How To Find the Ideal Twist Rate for Your Rifle

Let's talk about twist rates. Specifically, I want to dig into the purpose of rifling and how to determine the right twist rate for your rifle and cartridge. There's a bit of math here, but I promise to give you an "easy button" by the end. So let's get to it.
www.everydaymarksman.co www.everydaymarksman.co

Then once the diabolo has been hurled from a totally miss-tuned rifle:


I used the above three references plus all of your AGN posts regarding diabolo ballistics when I tuned my two FX Impact M3's, one a .177 the other a .30.

I appreciate your willingness to transfer your knowledge.
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Gamo  Gamo Vapor 10x variable pumper for May 2025?

bubbapearson
I contacted the good folks at Gamo and asked if there were any plans to release a .22 caliber version of the Vapor 10X in addition to the .177 rifle, but unfortunately, the answer was no. Maybe if sales of the new air rifle are very good on release and other folks express an interest in a .22 variant, well... maybe plans could change. Actually, as things now stand, I probably should count myself lucky if the rifle as descrbed is released when planned. To me, it doesn't really seem like 'the industry' puts a whole lot of emphasis on regularly releasing new, better quality variable pumpers, at least in relation to the other types (PCPs, springers and gas piston breakers in particular), so I guess I'll take what I can get. Since that's my favorite type, I consider that a shame, since once a hobbyist (me included) has acquired the maybe ten or twelve decent quality variable pump pneumatics now available, that's basically all she wrote.
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Umarex  My favorite budget PCP

R
I've been very pleased with both my Hatsan Blitz and my Beeman 2028. Compared to any other full auto with enough power for varmints? The Blitz is dirt cheap comparatively. Literally 1/10 the cost of a PB .22 not to mention the class 3 BS. I don't anticipate seeing a lot of activity by the Mfgrs. to further develop full auto it is a safe bet that more regulation is coming. IMO it is a get em while ya can thing. That said semi auto mechanisms are sometimes tweakable, and legal in our air powered world. That too will change.
I'm also happy with the Beeman, cheap and accurate it would be great if it came with the Buck rail muzzle and can from Beeman. Only slight challenge was removing the original front sight, pressed and glued it is on there. Nice and quiet for the backyard with the Buckrail can. All in under 200 bucks with the governors cut. Turned down to about 650 with H+N wadcutters I get 3 magazines per fill.
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Short hunt & successful recovery

michaelm_ski
SteveV said:
Worked an almost 12 hour shift at the driving range yesterday, so slept in and didn't hit the woods till 8. My main objective was to place a camo'd milk crate in a strategic spot, and then look for my lost pellet pouch. If I get a shot, great, if not, concentrate on finding that pellet pouch.

In no time at all I jumped one that was feeding on the ground, and was given a 20 something yard shot as he hopped up on a trunk to check me out - POP - wtf? that was a hit, but he's running up, no back down, POP - ok, two shots to nails this one, hmmm ...

View attachment 504249

So I glanced at my gauge, set up to reflect my reg pressure - WTF - 1300 psi, reg is set at approx. 1800 psi - Mr. Potato Head here forgot to topped off -


On a positive note, after searching at least 30 minutes, decided to call it a morning, only to walk right up on my pellet pouch in a completely different patch of woods
View attachment 504250



Vines
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Well at least one good thing happened for you.
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FX  First time shooter/buyer advice needed

L.Leon
shrive81 said:
thanks guys yeah i am very aware of the fact that i will enjoy it as i love target shooting and have been into archery for a long time and can shoot out to about 150 yards on my property so it is nice to have the ability to shoot these while still at home…. With that said i am an advocate of buy nice the first time and wont have to sell and rebuy later….

As for caliber seems like a lot of the guys are shooting .22 but i could be wrong
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You are on the right track buying top quality, particularly if you have the means, and more importantly the land to shoot on. At your starting price point you have great options. I like the .22 for what I do with my pellet rifles. The FX M4 is a multi caliber capable PCP, so you’re cover if you decide to change calibers. At your starting price point, you have nice options. Don’t overlook the BRK Ghost… Looking forward to reading more about your future PCP journey…
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Umarex  Umarex zelos bottle?

ImpactX
Trying to find the umarex zelos bottle version but nothing came up. I know the zelos is a copy of the snowpeak 60b. But I live in US and they do not sell the snowpeak guns. Trying to find the zelos bottle version but only see the tube version. Does umarex not make an bottle version or what? Do I have to buy aftermarket parts to convert it?
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Umarex  Umarex Origin

michaelm_ski
I just found out from Umarex that they have discontinued making the Origin , I don't understand why I bought my first one and love it and was looking for a .25 caliber one and I contacted Umarex about it and that's when I found out about the discontinued product. I love my rifle it's light and accurate so now I might go to the Avenger in .25 , what's your opinion on the discontinued rifle and the Avenger????
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So what kind of water do I use to cool my yong heng compressor

Gerry52
Dang! You've got a LOT of fittings between the compressor & your tank! Imho & experience the less fittings, the less chance for failure. There are ways to streamline that setup. I have a check valve on my tank fill adapter so I don't lose pressure from my tank when I bleed moisture during filling.
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Ever have a tank split while filling

$p00kygH0ST
delooper said:
I would have guessed the reverse -- maybe too little resin and the carbon fiber in a small spot was not under tension, allowing that spot to flex after a little resin lost its bond.
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Conjecture. You're just running cover for the real culprit. Tank gnomes.
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Ever have a tank split while filling

delooper
JimD said:
Perhaps too much resin and not enough fiber. Especially if the liner did not fail first. If the liner failed first, that could damage the carbon fiber. You would presumably know the liner failed because air would be rushing out - the carbon fiber is not expected to be able to stop a leak.
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I would have guessed the reverse -- maybe too little resin and the carbon fiber in a small spot was not under tension, allowing that spot to flex after a little resin lost its bond.
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Ever have a tank split while filling

$p00kygH0ST
rcs9250 said:
Yep, a typical 80 cubic ft aluminum scuba tank has a wall thickness of .562” to .625”, and is 3,000psi fill pressure. High pressure (3,300psi) aluminum scuba tanks are even thicker. I’ve cut many 3,000psi scuba tanks to make into lamps and know the wall thickness because I measured them.
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I was thinking smaller. I do realize that to meet the wall requirements for 6063 especially a Scuba sized bottle would be unwieldily heavy.
But I've seen 6063 and 7075 tubes and bottles that can take 250 and 300bar. I have an old FX aluminum bottle right now on my dreamline, 250bar, hydrod at 340bar less than .06% permanent expansion
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