Re: 308 Deer Hunting bullet
For the 10 twist, try the 190 SMK also. This bullet with your twist would do very well on very big deer. The 175 would do much better on smaller deer. Either would do wonders.
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.