I shoot a 12BVSS in 223 and it is quite accurate right out of the box (after break-in) however, the other day a guy showed up at the range with a brand new, gorgeous looking 12BTSS (laminated thumbhole stock) in 22-250. He let me shoot it and I was quite impressed with the fit and feel. He's shooting some very tight groups now with (I think) 50 or 55 grainers.
I would recommend the Sierra P/N 1400, 53 gr. Flat base, hollow point, and the Hornaday 53 gr. V-Max (with a B.C of .290).
There is a link somewhere here regarding barrel break in however, some ranges frown on patching out a barrel on the firing line, so ask ahead.
The process is basically, shoot one, clean, repeat until 10 shots fired, then shoot 3, clean, etc for another 20 shots.
IIRC, it should be noted that you are cleaning out the powder residue, not the copper during break in. On a factory barrel you want to build up some copper to fill in all the tooling marks/chatter in the barrel.
Are you planning to load your own? Or are you sticking with off the shelf ammo?
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