Thank you everybody. Please keep the comments coming, the 160gr partition secretly was at the top of my list however IF by some strange chance they don't shoot well out of his rifle we need a plan B,C,and,E. In addition my experience, which is 15 years of reloading, the partitions sometimes aren't as accurate as some bullets at 200-300yds. I really like the idea of a well constructed boat tail bullet, vs. flat base but maybe my thinking is totally wrong.
A little more about the rifle: Darcy Echols Stock: Edge Fill Winchester G stainless Action CRF Custom Aluminum bottom metal 1-8.5" Twist #2 benchmark Barell Timney Trigger Cerekoted Matte Black Swarovski 3-10 Z3 scope Talley lightweight lapped rings