a friend brought over a winchester model 70 7mm rem mag. He ordered a leupold scope with m1 turrets for it and asked me to find him a good load. I have never shot this rifle yet, but he said it was under 1 moa at 100 yds with a 160 speer grandslam. he gave me some money for powder/bullets etc, so my question is, where do i start. accubond? gameking? matchking? others? his main objective is to be able to shoot out to 700 yards. havent loaded for the 7mm a whole lot, so not sure which bullets have the best bc, expansion etc. i was thinking of starting with the 160 accubond, or the 175 gamking? both seem to have good bc's. thanks alot.