I took four animals in Africa with the 6.5 x 284 with 140 Grain Berger Elite Hunter bullets from 70 to 406 yards. No issues at all. All animals dropped within twenty yards of the shot. Shot a very nice warthog at 70 yards and put him right in the dirt. My Kudu was the farthest shot at 406 yards, hit him a little farther back than I would have liked but the bullet did its job and he only stumbled maybe 20 yards where the second shot put him down for good. So far so good as far as there performance!