RE: 270 and Elk
I've always used the Win. PP 150 gr. and have had great performance at close ranges.
One bull I shot at 64 yds through the lungs bullet passed through.
Second shot in lungs just a little further, the bullet was picked from the offside hide.
Another time around same yardage shoulder smashed and no recovery of bullet. Bull required a quick second shot and he was done.
I'd say great performance