My experience with the 270 is that the regular 130 grain bullets blow up, almost on impact. Even one of the regular type 150 grain bullets, I think it was a Sierra, blew up in a mountain goat, with only the jacket found, without a speck of lead in it! A 150 grain Nosler partition, on the other hand, went through a large elk, a bit on the angle from broadside, and was recoverd in the skin on the far side. It was perfect example of what a bullet should look like after going through an animal.
Dominion ammunition used to load a 160 grain round nose in the 270. It had a good reputation on large game, but of course, was not a long range load.