My guess is that your friend has never taken a deer with a 130 gr bullet from his 270. Just a guess.
I don't believe a heavier bullet will solve his problem(s).
Stick with the 130 grain for deer.... and I am sincere in my feelings (and experience) about this.

Imagine your grave on a windy winter night. You've been dead for 70 years.
It's been 50 since a visitor last paused at your tombstone.....
Now explain why you're in a pissy mood today.