I believe Eleanor O'Connor did her "one-shot safari" (17 animals with 19 shots) with the 160 Speer Hot-Core at 2650 or so from a 7x57.

I have been using the 160 Sierra GameKing at 2700 for a few years in the same cartridge and have yet to experience a jacket/core separation, at ranges from 100 to 375 yards. In fact all but one have exited. Haven't shot anything bigger than 250 pounds or so but gee....


“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck