a 1-12" twist will stabilize those bullet weights, but a 1-10 is probablly better as it will also stabilize these bullet weights and leaves the option of shooting heavier bullets in the 180-220g range. With a 30cal that has that much case capacity, you never want to limit yourself to lighter weight bullets.
Many .308 Win rifles have 1-12" twist bbls, but they are severly limited in possibilities.
Dan
+1 here too!+1
I would also recomend the 1 in 10 twist.
J E CUSTOM
+1 here too!
1:10" will stabilise all bullet weights in 30cal without problems.