My son shot a big mule deer buck a few years ago at just over 400 yds with the 155s in a 308. Two good hits. One through the rib cage, quarter sized exit. Hit a rib. Second exited through the lower shoulder. Exit about the same size. Not sure the velocity at that point. We have killed allot of critters with this bullet, elk, deer, wolves , coyotes. They are definitely thicker jacketed than the Berger, but they kill really well. I shot a wolf at 300 yds through the rib cage. That left an exit about the size of a 50 cent piece. That seems to e the norm. I haven't shot critters with it at 500 or 600 yds , but I know Pat has, maybe he will chime in. He shoots alot of them.