Shootingsitelock(?)

"JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t" (jawzx2)
05/19/2020 at 18:36 • Filed to: Gunlopnik, Shooting, Air powered

I put a new exhaust valve in my Eun Jin Sumatra . 22 PCP air rifle today. The old valve was leaking, I tried to machine one myself from Delrin, which worked, mostly... It held air and fired, b ut it was too light and I got the dimensions slightly wrong as well, so shot power was very inconsistent... In any case I ordered a new factory valve, installed it and sighted the rifle back in. These were my best groups:

This is a very good group for a hollow point pellet...

Still very good results for a hollow-point. I understand why people are talking about these. This is a very, very good group for a ~16 grain .22 hollow-point pellet.

Man this thing LOVES Baracuda Match 5.52's. I think the flyer was my fault, as Baracudas are usually super consistent.

I’m leaving the scope dialed slightly high, as I sighted it at middle-red on the power wheel (I know that makes no sense unless you own a Sumatra, but it’s slightly over half power ), which is throwing those 21 grain Baracuda Match 5.52s at 1050fps, and the ~16 grain JSB Diabolo Hades at about 1180fps. I often hunt with a 26 grain slug, or turn the power down a smidge to get more shots ou t of the tank, so this is a reasonable POI for these pellets at these powers... Very “middle of the road”

I'm quite proud of that Baracuda group.

DISCUSSION (16)

404 - User No Longer Available > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 19:10

I’m still waiting for the range to reopen so I can shoot IPSC matches again . My holster for my USP finally arrived but that whole COVID thing happened, the club’s lease was over and they are looking for a new place to move to.

jminer > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 19:37

Those are good looking groups! I’ve not shot any of that style of air rifle, how does it compare to and why would you use it over a regular rifle?

Chariotoflove > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 20:08

I never get to shoot until I go visit the family, where we can set up targets against the hill. My brother and my BIL work at a gun store/range, and business has been off the charts for them during the lockdown. Apparently, their biggest customer base increase has been from the Chinese.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > jminer
05/19/2020 at 20:19

So, PCPs are a w ei rd thing... The Koreans, Americans, and Turks all make very high powered pre-charged pneumatic guns, with the AirForce Texan (USA) and Samyang Dragon Claw (Korea ) figh ting it out for top dog. T hese guns are . 45 and . 50 caliber respectively and offer in the neighborhood of 700fp muzzle energy (it’s worth noting here, that custom or extremely limited production PCP guns, mostly made in the USA, are capable of ~2000fp muzzle energy in large calibers ) . The .22 and .25 caliber guns like mine are pretty close to .22 long, at ~80fp or so muzzle energy. The PCP design allows for repeaters (the Sumatra is a six-shot lever- actio n gun), as well as very high muzzle energy. They are quieter than a comparable powd er rifle, and in the case of the .22 caliber guns, pellets are as little as $.01 each.

HOWEVER, a PCP requires the infrastructure to support ultra-hi gh -pressure air. They typically operate at reservoir pressures of 3000 to 4500 PSI. Hand pumps are available that will reach those pressures, but filling a large 500cc reservoir like my Sumatra has can take 15-20 minutes of pumping. I own a hand pump, but I have also inve ste d in an electric high-pressure pump and a carbon-fiber-wrapped 4500PSI high-pressure storage tank, to the tune of ~$1000. If you live near a dive shop, you may be able to refill your gun or tank there for just a couple bucks, but only if the dive shop people are cool.

The per- shot cost is VERY low if you shoot a lot, and the power and accuracy is on par with powder guns, while being quieter (though the big muzzle energy guns are still quite loud). T he B ritish, Germans, Swe des, and Russians all make regulated PCP guns that are capable of muzzle velocity consistency of less than 3 fps, T he ones with good barrels (Daystate(UK), FX(Sweden), Anschutz(German) and Ataman(Russia) in particular ) are about as accurate as a gun can get at ranges of 100 yards or less. They’re also super cool, and people at the range invariably ask you about them.

My Sumatra is a hunting gun by design, and though it does not have a fully regulated valve, or a match-grade trigger, it has a Walther-Lothar barrel and shoots and *DAMN* good.

My bird IS the word > 404 - User No Longer Available
05/19/2020 at 21:00

I still want to take my cyber magnum to an NRA cowboy silhouette match.

My bird IS the word > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 21:02

I’m still trying to get my friends to go to the range. I’m still not sure they can even buy ammo

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > My bird IS the word
05/19/2020 at 21:06

O ther nice things about Air Rifles: Ammo always available, nothing regulated by the ATF...

Glad I bought a bunch ammo in J an u ar y. Current prices and “a vailability” are insanity.

jminer > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 21:36

I was aware of the larger caliber rounds and around here I know they are used as a replacement for a muzzleloader when hunting larger game. Easier to use and clean while still limited in velocity and range allowing use closer to populated areas. They’re fairly popular in Illinois as they don’t allow deer hunting with centerfire rifles. Last I looked into them was a few years ago and they were way too expensive for my blood and I didn’t mind shooting black powder (enjoy it actually).

I didn’t know they were common in the 22 caliber world outside of the ultra high end competition shooting.

Thank you for the very detailed post - I really appreciate it. Also now I’m looking and see that the 22 PCP rifles are fairly reasonable in cost which adds them to my wish list. I don’t shoot as much as I used to, and that costs less than a nice deer rifle

TheRealBicycleBuck > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/19/2020 at 21:53

After shooting an air rifle at my uncle’s place, I found a GAMO Whisper Fusion Elite break-barrel .22 on clearance for less than $100. We shot it a few times, but the kids weren’t really interested. My buddy has another GAMO that’s supposed to be quiet, but the smaller pellet and higher velocity makes it much louder than mine. We were all surprised when we shot them side-by-side.

I really need to move farther out where we can shoot without disturbing neighbors.

My bird IS the word > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/20/2020 at 08:33

What really sucks is that I was planning to bulk buy ammo for my ak anyway. Just got a new job in February. Just got the ammo I ordered this week...

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > TheRealBicycleBuck
05/20/2020 at 10:00

The Gamo break-barrel guns, weather spring-piston or gas piston are a bit rough and ready. They make absurd muzzle energy for a spring-gun, but they tend to have... inconsistent... shooting character. Also, the Magnum-Nitro Gamos are renowned as scope destroyers. The motion imparted by a high-power springer is totally unlike normal firearm recoil, and the impulse, though lower total energy, is incredibly fast. Very, very few scopes can survive more than a couple dozen shots mounted to a Gamo Magnum-Nitro gun. I bought one and destroyed three factory scopes under Gamo’s warranty (not really surprising, it’s a cheap-ass scope) but when it also ate a nice Hawke Optics unit that cost significantly more than twice what the gun itself cost, I said goodbye to it. Thankfully Hawke did replace the scope under their warranty, but they included a note that if I used it on a magnum-nitro springer again, they would not honor the warranty a second time.

That Gamo was never that accurate, and even though it would throw 15 grain pellets at nearly 1100fps (*MADNESS* for a .22 springer!) it wasn’t a very effective shooting tool.

The Germans arguably make the best springers, Weihrauch specifically, very good guns, though they are a bit pricey. The Brits put out some nice spring guns too and actually, the Crosman and Diana guns are pretty OK. The Diana’s are budget-G erman. W ell made and consistent at reasonable prices. A good springer can be as expensive as a PCP, and though you don’t need the high pressure air infrastructure, I have never really liked shooting them much myself, and you’ll never get the power or trigger subtlety you can with a PCP, or a good multi-pump pneumatic gun.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Chariotoflove
05/20/2020 at 10:04

Yeah, the R ednecks and T rumpers have not been subtle about blaming the Chinese (really, Asians in general) and threatening them. It (sadly) makes sense that Chinese Americans would be stocking up on self-defense gear. Thanks MAGA hats.

TheRealBicycleBuck > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/20/2020 at 10:35

That’s all excellent information. I was wondering about the “recoil reducing rail” mount on it. You provided some insight into that. I’ll keep an eye on the scope.

This is my first airgun since the crossman pump pistol I had when I w as a kid. They’ve come a long way!

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > TheRealBicycleBuck
05/20/2020 at 10:56

My brother swears by spring-guns, and he has many thousands of dollars invested in Weihrauch guns. I’ll admit, they are without a doubt the nicest springers I’ve ever shot, but I just don’t like them as much as pneumatic guns, either PCP or pump. For high-power applications springers become very troublesome, both because of recoil and because of the pure mechanics involved in producing that much power from a compressed spring. A nice low/mid-power Diana (like the model 34 ) is a terrific plinking and small-bird-removal tool, but I just can’t abide the sacrifices really high-power spring-guns force on the shooter.

TheRealBicycleBuck > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/20/2020 at 11:05

It was interesting watching my kids learn how to shoot my uncle’s break-barrel. They each had a different technique for getting the leverage they needed to cock the gun.

Chariotoflove > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t
05/20/2020 at 14:40

Yeah, that sucks. It’s not like any individual Chinese person is responsible for anything bad happening to our population. It’s just venting at the most available target.