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Like you, I live in CA. I have a Savage Model 12 FV in .223. It has a twist of 1 in 9'. (The best auto loader can't be made to be as accurate as the best bolt gun). The best group aggregate (5, 5 shot groups) I've shot with it was .430' at 100 yds, with handloads. It's now being fitted with a match grade Hart barrel. The purpose of the project is to learn benchrest technique and the ins and outs of reloading and load development, and to find out how good a .223 Rem can be made to shoot.
The next step, should I decide to take it, would be a serious ($$$) bench gun in 6mm PPC or 6mm BR. The best of these are completely custom made with actions such as Stolle, Hart, Nesika, and the like, just to name a few.
What are your goals? I chose both the Savage and the .223 Rem cartridge for it's performance per dollar while I learned, and I have not been disappointed.
If you want high accuracy and just want to shoot, a good .22 rimfire (Anschutz, Fienwerkbau, Suhl etc) is the way to go. If you want to shoot a centerfire cartridge at high accuracy then a certain commitment is required in time (spent not shooting) and money. Reloading is a must as well as a chronograph and good bench equipment. It all depends on what you want to do.
Check out this magazine;
http://www.precisionshooting.com/
You can't buy it on the news stand and some gunsmiths and other suppliers advertize only in this magazine. I think they sell back issues if you don't care to subscribe at first.
I hope this helps.
Bill Smith