I have a question. I have a 30-06 that is 1 in 10 twist. I have a .308 that is 1 in 12 twist. I notice some of the new .308s are 1 in 10 twist and they handle the heavier bullets better. Like my .308 shoots 150s well but the 30-06 shoots 165s better than 150. My guess is that the .308 would shoot 165s best if it was 1 in 10. Why even make a .308 1 in 12? They are only 200 fps max below the 30-06.