Has anyone tried the century 2894 spring in any of their big bores for more power like a PBBA or EXTREME BIG BORE

So I bought an airforce talon ss blem directly from airforce on sale for a good price. I have a condor and texan so I'm familiar with the platform. The only thing throwing me for a loop is it says it's a classic series. It says traditional trigger guard and grip but mentions nothing else. The pictures show it without a gauge and make no mention of the spin loc tank. Anyone know the scoop? Thanks

I know the answer to the question "how tight should my jam nut be" is going to depend on liner length, caliber, fpe at the muzzle, whether the rifle is using o-rings as spacers between the liner and the barrel housing or a carbon fiber spacer instead. There are probably a lot of other things to take into consideration that I'm not even thinking of. And I know that a lot of the answers are going to be given in terms of how many turns after hand tight rather than torque specs -- either one is fine with me. I just need a sanity check.

I've got an fx maverick 30 cal sniper with a 1:18 twist liner and a carbon fiber spacer between the liner and the barrel housing. I'm shooting nsa 54.5 grain slugs at about 950 fps, but might go to 980 fps. Either way that's in the 109 fpe to 116 fpe range. The liner is trying to spin the slug to the right, but if the jam nut is too loose, then the liner will slip (spin) to the left. I want the jam nut to be tight enough to prevent the liner from slipping, but I don't want to bend my liner. I can't really tell if the liner is slipping or not and there doesn't seem to be any way to know for sure.

Currently I'm tightening my jam nut 1/16th of a turn after fully hand tightening, but I'm wondering if that's really enough -- is 1/8th of a turn OK without bending the liner?

The FX motto "not too tight -- not too loose" causes irreversible insanity.

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I am wondering if anyone could figure out the year on my Sears J.C. Higgins 126.19300. Pictures attached. Thanks!

Just got a new pump action pcp air rifle. 50 cal , I actually ordered a 45 cal but someone screwed up and sent a 50. Waiting for it to arrive was torture, so I elected not to go through that part again. They offered to trade it out with a 457 that I actually ordered. I declined. I would like any advice in general about these airguns . Specifically I would like to know a few good slugs for that caliber if anyone knows of any. Now I’m waiting on slugs the place I got the gun is sending me for free, I did get 50 dollars worth of free ammo out of the whole thing. I would like to find something for now, I was considering 50 cal lead balls just so I can shoot this thing. lol it’s killing me I want to shoot it. Thanks for any advice.

Hi,

I am trying to get my fps up shooting zan 13g slugs but I get stuck at around 845fps with the reg set at 110bar.
micro wheel is almost at 4.
raising the reg pressure does not make much difference.
It is not a sub 12 version As I’m located in Denmark.

any idea why I can not get the velocity up?

thanks
Quito

Has anyone seen or shot the lethal air 12 gauge air shotgun I keep seeing it on lethal airs website but can't find anything on it.

I am getting fluctuations from 740 ish fps to 850 ish fps and have removed and cleaned the regulator with no change . Any input would be appreciated.
Thnx ahead.

My buddy has one. It quit spitting pllets. 177 any ideas where to start? Cleaned the barrel, had 5 stuck but now won't do anything.

We are currently investigating the recoil energy and recoil velocity of mainstream airguns. If you have relevant information or data, please let me know. Thanks！

I'm looking for a replacement aftermarket piston seal for the JTS portable compressor, does anyone know the exact size needed for this compressor and recommend a place to purchase from?

I know I could try to contact JTS but I really don't want to deal with them if I don't have to.

Nitro-piston rifles can stay cocked for some time without damaging the ram. Now a spring being
compressed longer will get damaged. When out hunting, do owners of a springgun wait for the
time to shoot and then load?? Oportunities may not last., cocking the gun makes noise.
Just wondering

Hey all, I am looking for info on a challenger arms plainsman. It is missing parts and the pump is stuck. How much is it worth? Can I find any parts for it? It's 22 cal and any help is appreciated. Thanks!

Has anyone power tuned their benjamin marauder .22 for heavy slugs I've got the hammer and spring maxed out and vms screw all the way out and the stock valve modded took out the return spring and end cap

Hello All,
just installed Slug power kit, Tung Hammer, power hammer spring on my FX M3, i believe i've done something wrong with the assembly but i don't know what exactly.
now the power wheel adjuster is working in reverse, Velocity increase when i drop from 16 to 1, in other words the highest Velocity now is on 1.
would like to Pin point the issues if someone has faced the same issue before and how to fix it.
thanks.
much appreciate the help

If I add a larger plenum what else do I need to change/add to the gun?

Hello Folks, I'm having a problem regarding the LCS SK-19 which I had bought about 9 months ago while visiting the U.S, but I had to dismantle it in order to transport it back home. I can reassemble it otherwise, but there's a part from the trigger system specifically that I can't seem to remember where it goes and in all of the videos that I've checked online, I don't see it in any of them. I reached out to a few companies for help and got nothing, I even reached out to LCS via email and haven't gotten a response yet. I recently reached out to a Youtuber and he suggested that I try out this forum for answers, so please, please any help would be appreciated. I'm practically begging at this point, because it's a brand new gun and I haven't gotten to use it yet. The part that is giving me trouble is No.1 in the picture below. I know where the parts under No. 2 goes, it's Just No. 1 that's the issue.

I have the vortex spring kit in my Mark 3 and I'm getting about 660-ish feet per second with 16gr pellets... is there anybody else that offers a kit that can get me up around 800 + ft per second? Anybody out there with any tips or tricks or I can up the foot pounds in this baby?

want a hard hitting .30 that doesnt require a ton of tuning and can shoot slugs well out of the box (900-1000 fps). feedback welcome. thanks in advance

My marauder valve stem was bent and wouldn't seal so I ordered a new valve stem but noticed there's a little scratch and knick inside the valve body is it still okay and will it leak?

What's the most accurate slugs for a .22 marauder currently I'm power tuning mine taking the return spring and end Cap out the valve and maxing out the hammer and spring and vms screw

I shoot an unregulated USFT (Hunter #150) in 25 meter heavy varmint (20 FPE max) benchrest.

I can regularly shoot 247+ cards but occasionally I’ll get shots that are 2 to 3 mm high or low which prevent scoring a 250. I’ve traced the problem to variations in muzzle velocity. The POI on the y-axis on average goes up/down 0.17 mm for each FPS swing in muzzle velocity. (This is in line with predictions by Strelok and Chairgun.) Even with tethering to keep reservoir pressure constant, across 60 shots, I can often see an extreme spread of 35 FPS (with SD of 8-10) which implies a y-axis range of 6 mm which is not good for scores.

I’ve tried changing poppets and hammer springs, but I don’t get much change in FPS spread. I wonder if the issue is friction in the trigger mechanism or Hammer spring guide.

This leads me to several questions:


Hoping some of you USFT folks can provide guidance on this problem.

Follow-up: Tim McMurray got back to me. To minimize ES, he recommends maximizing hammer spring tension and using the transfer port restrictor to adjust to desired muzzle velocity. Less hammer spring travel reduces the effect of drag which can vary from shot to shot.

I followed his guidance and based on tethered shot strings of 100+ shots, the standard deviation of muzzle velocity fell from 8.1 FPS with the hammer spring adjuster set 6 turns back from max and no transfer port restrictor, to 4.6 FPS with the hammer spring adjuster set 1 turn from max and the transfer port restrictor closed enough to achieve target velocity. Spreads have tightened significantly as a result of more consistent muzzle velocities.

What airguns out there would you all like to see some good aftermarket mags for? I'm currently working on the AEA HP/SF lines in all 3 calibers and a couple sizes, but after that I'm looking for my next big project.

If you can't think of mag ideas I'm open to other 3d printed accessory ideas.

So far on my research further list
Hatsan Jet 1/2 and 3 if its compatable with the others
Air Venturi Avenger
JTS Airacuda specifically single shot tray
Red Panda
Macavity MA2
AEA Challenger
Air Arms S410/S510

If I ever see a mag for it in the wild I'll attempt
Bantan Brocock XR
Daystate Revere

Does anyone know what style/type of threads Hatsan uses on there airguns?

Are there any PCP rifles that come with a plenum bleed valve (knob or whatever) that would allow the shooter to bleed off excess plenum pressure for those times when the plenum pressure is above the reg setting?

You guys know how the plenum pressure goes up when the ambient temperature goes up -- like you take a shot when it's 60 degrees F and a few hours later you want to take a shot, but the plenum pressure is above your set regulator pressure because the outside temp is now 75 degrees F and the sun came out. You know your shot is going to be low FPS because of the high plenum pressure. So what do you do? If there was a bleed valve on the plenum, you could let a small amount of air out of the plenum and let the regulator bring the plenum pressure back up to normal and then take the shot.

So back to the main question -- are there any PCP rifles that come with a plenum bleed valve?

stovepipe