6.5-300 wsm

I just had two custom rifles built, one in 6.5/300 WSM and 7MM WSM that I will discuss later. For now I want to introduce the the discussion and get your thoughts. If have a 7MM WSM that is able to shoot a 162 gr Hornady ELD-X's bullets at 3170 fps with 1/2" accuracy at 100 yrs, why would I...