Having some problems with my .25 Need help again
Ok this morning was the first day that it was not snowy and windy since I have had my .25 barrel so I shot a few groups to see what it could really do. I am shooting at 40 yards and using JSBs. My first group was not so good(1.5inches), the second was good at under .75 inches, the third was bad again(over 1.5inches), the fourth had most of the shots go into .5 inches and two shots openng it up to over 1.5 inches. I don’t know what the problem is. 😥 The only thing I can come up with is that the JSBs are not consistant in this barrel, the numbers are good but the groups are not. I will try some different .25s when I get them but have only JSBs for now.
It’s not my tank or valve because it works fine on my other Talon.
It’s not my scope because I tried it on my BSA Lonestar and got great groups.
It’s not the wind because there wasn’t any this morning.
It’s not me because I shot several groups from my other Talon and BSA and got several good, consistant groups from both.
Any thoughts?
Thanks
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Jeff, send the barrel back to me. I’d like to run some tests.
walt
Try this.
Turn your gun all the way down and shoot a group.
Turn up the PW a bit and shoot another group.
Repeat over and over until you are back at full power.
See what happens with the groups.
I am shooting in the high 800s so no chance of going supersonic. I thought the cocking knob my be giving me problems to but I am getting consistant numbers. I still plan on fixing it but I don’t see how it could be the problem when a five shot string looks like this 885,887, 884, 880, 882. I already checked my scope on a BSA Lonestar and got great groups so the scope is not the problem. I tightened all of the bushing screws correctly. I did so with a torque wrench so they are all tightened evenly. I have tried 4 different pellets. (JSBs, Kodiaks, Beeman FTS, and H&N Ram points.) I have not used a shroud for any of my shooting either. Most of the groups I shoot are around 1.5-2.5 inches at 40 yards with the JSBs and Kodiaks, with no shots touching, just a round group with no stringing up or down. I have had some groups with 2 or 3 shots touching and the last 2 or 3 all over the place, again no pattern.
If you can not do that. Trade your gun in for a Tea Set and just give up.
Jeff, got your PM and just read the thread. Sorry for being so late, but I do not normally browse this part of the forum.
synopsis gives good advice. Do you have a 2nd frame you can swap the barrel into? Since you have not replied to that, I will assume you don’t.
there isn’t enough information to be really accurate, but I can take some guesses:
the problem is not your crown. A bad crown will give consistently bad results with the same ammo. If your chrony strings are accurate, it is not the valve or hammer or trigger or trigger sear. However, chronys have been known to have problems. If you have a friend with another chrony, try a string over his to see if it mirrors your own. If no 2nd chrony is available, then back off on your gun just in case you are near the sonic barrier. The noise will also tell you. some soft, some loud? If so, you found your problem. If not, then move on.
Your breech was a dead giveaway. Take the handle off the breech and file it down some, make it a little shorter so it will not scrape when you tighten it down fully. Just a little at a time, you can remove but cannot add so go slowly. Loctite it already.
The breech symptoms also indicate you might have something else loose. I would check scope first. Rings? try different rings. Check rail to be sure no cracks in the dovetails or other debris. If you have a tri rail take it off and mount direct. Take barrel out and check your bushings. Are they moving at all? wok mentioned loosen then tighten all grubs evenly. This is difficult, even for experts. If your barrel or bushings are even a tad off, it binds the screws so that they don’t all tighten evenly. Go slowly and gently. Don’t force it.
My hunch is that your valve and hammer/spring are fine. Even a lousy valve setup will still deliver reasonably accurate groups, usually with some vertical stringing. Its probably something else, but you have not indicated what the accuracy problems are: vertical stringing? horizontal? 11 oclock to 5 oclock? random? Some REALLY important considerations:
1) try a different pellet. PCPs are not usually that finicky, but there’s always a rulebreaker.
2) if you have a shroud, TAKE IT OFF FOR ALL TESTING. This is the culprit in like 90% of the accuracy problems I have seen due to alignment problems.
Get back to us on this thread. the system should pm me when you reply, but if you don’t hear back from me in a couple days email me. Weekends are for kids. If all else fails you can send me your gun and I will have DH do his cumshot all over it, that should fix things. Worked on mine. Shit. Or was that wok’s? can’t remember.
walt
No testing today with anything because of the wind…..maybe I will get a good day this weekend.
Put a 22 barrel in and see how it shoots.
dvu0704
I just tried this and yes the barrel was machined from the right end. I didn’t think this was the problem because I could feel the choke when I cleaned the barrel when I first got it. Good idea though
Jeff, you should try what WOK adviced below quote, maybe the barrel machined from the wrong side?
Use a wood dowel and push it through the barrel.
Keep track of where the pellet is hard to push through and where it is loose.
Does the pellet get tighter as you pass it through the muzzle?
I shot a few more groups tonight but the wind was a major factor so I can’t judge the groups. I tried some H&N Ram Points and they are the worst pellet I have shot so far. The first 3 shots made a group over 10 inches at 50 yards so I put the lid back on that tin. I will give it one more try tomorrow morning.
I took WOKs advice and cleaned the frame which made it smoother but it was still inaccurate. I also shot some more this morning and still got bad groups.(I now have 60 shots through the barrel after cleaning the pellet lube out)
I haven’t shot mine enough to really make any valid observations. But since I am too a latest run Walter barrel owner thought I would chime in. I cleaned/polished the barrel and broke her down for a cleaning (she was a little dirty inside). Smoothed the hammer & weight as it was ruff on the edges like syn said. Lubed her up let her dry and took her out for some fun. I was getting 3″ groups at 50 yards with 6-ring slugs. But I have only put maybe a 100 pellets through and my top hat is stock at .087. I have an AF Scope also 😥 I don’t have a chrony so I am still finding a sweet spot playing with fill pressures and pw settings (my groups got better at the same pw setting I had on the .22 which is 6/0) to avoid having to change the top hat which I’m sure I will need to do because the slugs are some heavy sons of bitches 🙂 I must say the groups have been getting better. And I put 1000 pellets through her stock as a .22 before she was shooting consistently and accurately enough to take hunting. My hunting buddy even yelled at me for messing with it. Damn 6-rings are hard as shit to push in. I’m getting the technique down though! Don’t have any other .25’s to test with yet. I am thinking of trying the H&N 30 or Kodiak’s for a small critter gun and slugs for bigger critters and or farther shots. I like the Surefires. They have a nice mushroom. Also I noticed you said you switch to non-lubed pellets and in that time you cleaned the barrel but only shot 20 shots. I think you should take some more time to break it in, check the custom valve and clean the frame.
Surefire vs steel!
Any who Walt, Jerry (Well your sons too 🙂 )…. Ya’ll some bad bad men!!!!
Take a pellet and put it in the breech.
Use a wood dowel and push it through the barrel.
Keep track of where the pellet is hard to push through and where it is loose.
Does the pellet get tighter as you pass it through the muzzle?
Other than Walt cutting it down to size nothing has been done to it. The pellets fit good except Eun Jins which require a lot of pressure to push in the breech. The crown looks good and doesn’t have any burrs.
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WOK
If you don’t mind me asking, what is the point of this? just curious
Walt
I want to try a a couple more things first.