GA Precision .308, the load was 168 gr. TSX, 42.4 gr. RL 15, F210M, 2.791" OAL, Lapua Brass. Groups average .5" at 100 yds and 2780 fps. The shooter was one of my boys on his first hunt. Approx. 15 year old Cow bison at 200 yds, 1 shot to the front shoulders, no bones hit, complete pass through. The buff dropped in her tracks and stayed there. I had hoped to recover the bullet, but no luck there.