I am looking for a good idea of proper twist rate. From what I understand, the heavier the bullet, the faster the twist rate you need. I assume that a 1:10" twist is faster than a 1:12". I shoot a standard M77 ruger in 30-06, and the advertised twist rate is 1:10". So would I be better off shooting a 150g or a 180g bullet? which would be more accurate? or is it enough to even worry about?? thanks in advanced.