Re: .308 win 185gr berger
208 amax's and the 308 is a sweet combo. 2600 is very possible in 24+" bbls. The 12 twist while not optimum works just fine. Accuracy is good as well. 168 class bullets are great but the 208 can dang near double the effective hunting range of any 168 or 175 class bullet.
N540, N550 or RL17 will get you what you want with the heavies.
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.