Home Forums Hunting & Shooting Ask The Gunwriters What are The variables in .22LR accuracy or do I just have a problem child?

Guys whatever I findout I will post....and pal.......NEVER .

PennDog

What about pulling it from the stock and taking that variable out of the picture?

Have you tried a different scope?

You've tried a scope, check. I assume the mounts & screws check OK too.
New barrel, check.
Ammo, check.

Did you install the new barrel yourself? Did it go on smoothly? Any indications that the action the culprit?

Seems like you are left only with the action or the bedding.

Have tried:
1. two different scopes (they perform on other rifles)
2. original barrel, cut original barrel, new pac-nor barrel
3. action bedded and barrel floated (Did try pressure points also)
4. at least 22 varieties of ammo ranging from thunderbolts to Lapua X-act.
5. barrel installed by a professional gunsmith with lilja match reamer.
6. new shooter
7. side by side with known shooters to "eliminate" wind as a variable.

Have NOT:
1. removed barrel action from stock
2. done anything to the bolt and/or magazine

I will do some investigation into the bolt asap and see if I can find some "instability" issues there and or physical issues (e.g. spring related, extractors, etc...). Stay tuned.

PennDog

Pretty soon it's going to be like that authentic original prehistoric Indian axe I once owned. It had only had the handle replaced twice and the head once...

LOL!

I only wanted PennDog to let me know how this works out by PM, because I'll likely miss it when he posts it publicly.

Sounds about right Rocky......I will soon not be able to call it a Browning A-bolt . Again I have never been accused of being "overly bright"!!!! Gotcha covered SRM....I'll send you a PM.....if and when I ever get it figured out!

PennDog

slug the bore bet you find a loose or tight spot

Just a WAG but ...

Check the bolt for movement when a round is fired and do it multiple times. It might give an indication if there's something not right or inconsistent with the bolt, action or lugs.

Have you shot it without the magazine in place?

Rocky,

As you probably know, Lapua used to produce two slightly different diameter bullets for their Midas .22 LR ammo - .223" and .224" (designated with different letters) so shooters could match their barrel diameter. Not sure if Lapua still produces two different diameters, but at one time they did.

Fish hit what I was thinking, DZ told me about the same thing once -- bolt timing.
I agree on checking the throat. I set back my 10-22T to "jam" and the results were night and day. Prior to that, I ground the bolt face to .0405 headspace, that was an improvement too. And before that, I was rim-gaging.
These days, rim-gaging is more important than it was, I think quality is down from pre-Obama.
But then again, you could simply have a jinxed female rifle.

I will check tonight for bolt movement when dry fired (with snap cap in place)....as for a tight or loose spot I suppose it is possible I had two barrels with that issue? Pac-nor has offered to replace if we (gunsmith) think that it is the issue. I also plan on taking the bolt apart tonight to see if there are any obvious issues? What about extractors - different pressures they might apply on the round?

I have not fired with the magazine removed so I will do that.

As for Lapua Master M and L I tried both of those.

PennDog

Once you changed the barrel, for me, the problem almost has to be in the action. Most likely the bolt. Whether it's lugs or bolt face or inconsistent firing pin spring or extractors. It's just got to be in there somewhere. I definitely would try and fire it single shot. The mag could be putting pressure on the bottom of the bolt. And I still want to know if you have equal lug contact.

OK took a good look at the bolt and the most obvious thing may be causing my accuracy issues are that the ejector and firing pin are one in the same.....see below:
[img:left][/img]

The ejector/firing pin are on the right. If/when the ejector head hits the rim of the case that movement is likely causing the observed results?? I saw nothing else that is readily apparent - the magazine may very well put some upward pressure on the bottom of the bolt so I'll fire without it in. The lug (back of bolt knob) looked pretty uniform in wear. As for the firing pin/ejector.....any recommendations? - if you agree that this is the likely culprit.

PennDog

My Dad had one of those rifles and it was a shootin' MFer. They may not be quite benchrest grade, but they usually do shoot pretty well.

Show a few pictures of the fired cases including the firing pin marks please.

Glenn

I would suspect that the ejector portion is slightly touching the rim of the cartridge but in an inconsistent manner. Filing it back slightly would get it out of the way.

Body feels not good,D3 Items then go to the hospital for examination, the doctor asked X-rayed, X-ray, MD wrote diagnosis, and then I took the diagnosis and film to the doctor. Surprisingly, the doctors took X-ray diagnosis began shaking his head, his mouth Gee, I was immediately pumped wow cool, want to ask the doctor left how long results that doctors say is: "Oh, now young doctors, the handwriting is really bad. "Buy WOW Gold

Thats what I am thinking DakotaDeer.....the ejector hits the rim just prior to the firing pin. I will give it a go and report the results.

PennDog

Penndog this entire project would make a great,informative article
You could title something like - Attempting to Turn a Pig into a Racehorse