Everytime I think of using a Sierra Game King, I remember a deer hunt with a friend about 20 years ago in which a 165 GK launched at about 2850 fps spined a small mule deer at 225 yards. The bullet came unglued and literally blew the top half of the deer off (it left at least a basketball sized hole). I can't say the bullet failed in that the deer died pretty much instantly, but It just seemed a bullet loaded at .30-06 velocities shouldn't do that much destruction at 225 yards