So are we all in agreement the OP needs to go 270 in a 70 with 130 GKs unless he wants to kill rocks with a 375 and Hornadys
I have to admit, the one time I shot a whitetail with a .270 and 130 GK's the reaction was impressive. 100 yards, quartering away, hit just behind the near shoulder. Stood straight up on his hind legs, then collapse in a heap. The heart was more or less intact, but it fell out of the chest when opened.
No exit, no core found, just the jacket against the far side of the hide. The bullet didn't "fail" since the deer died, but I probably won't use one of them again. At least, not out of the mighty Ruger #1 .270