Re: need some B.C. info please
The published BC for the 178 AMAX is .496, most shooters will agree that its more like .525 The 175 Sierra MK is published at .495-.505 I think this is fairly close. It may be increased slightly depending on rifle type, but it will be close to .500
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.