Re: Good twist rate for .300 WM?
10x is a bit steep for my taste. 11 will handle any 210 and 220 with ease and wont be too hash with the 150's either. If you want to go over 220, then go with the 10x.
BTW, a 12x will stabilize a 200 AB just fine.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.