RE: 150 grain round nose in .270?
I have a 270win and can't say enough good things about. Its taken white tails, mule deer, and moose and impressivly at that.
But my go to guns are a 35 whelen, a 358win, and a 35rem and their ausome on game performance with surprisingly lower felt recoil than most lighter faster magnums. (350rem pretty much the same as the whelen).