Re: 22lr group sizes?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">My rifle is a relatively plain receiver, a bolt my Brother had sent out and had professionally worked to improve the bolt face, Volquartsen trigger internals and big mag release, and a barrel and laminated sorta truck challenge-ish laminated stock that was marketed by Kimber about a dozen years ago for custom usage. .920" diameter, like the rest, stainless, maybe of L-W origin, I don't know. Fed GMM.
Cycles funny, I get some stoppages, but it shoots best I've seen of any .22lr; bets heck out of the half dozen Butler Creek based Zombie Rifles I've built in the past. My knowledge is not the deep or wide.
Greg</div></div>
Did you say Green Mountain barrel? There are plenty of things you can do to accurize a 10-22, for sure. These guys specialize in it:
http://www.ct-precision.com/ruger10-22.html
But at the end of the day, it is a semi-automatic weapon and generally, the most accurate gas gun is not going to be as accurate as the most accurate bolt gun.
My setup is single shot. It is set up for iron sights prone shooting (meaning extra long barrel), but I shoot it with a scope and bipod off of a TAB rear bag. I don't consider myself any kind of a serious shot by any stretch of the imagination, nor am I lying about my performance. I am counting all fliers. The only conclusion that I can reach is that my gun really shoots. It is the first "custom" that I have owned and definitely outshoots my other rifles (that .440 MOA group today officially tops the best I have done with my .17 HMR and it matches the HMR on average at 100 yards.).
The other thing is ammo. Have you tried Match Eley? They make Match and Tenex specifically for semi-autos. It might be worth trying out a box to see what it can do. Another thing to remember is that not all lots are created equal. The same make and model of ammo in a different lot will probably shoot differently.
If you check out the benchrest central rimfire forum, you find these guys are compulsive about finding the perfect lot. As much time as center fire folks spend working up a load, they spend looking for the right lot. It is a lot of fun, actually.