Re: 162 A-Max (7mm) & 140 A-Max (.264) for deer and or elk?
Deer yes, elk NO. The AMAX bullets are to frangiable for the big and thick elk. Consider the 162 hornaday SPBT for elk.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, 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.