I'd prob let the rifle decide what it likes best. I have one .270 that prefers 150 Partitions over the others. In my other 270's I shoot more 130's than anything.
Saying that, if I was a "one gun/one bullet" man I'd pick the 150. We know it'll cover everything from deer to moose and I would not be afraid to hunt Grizz with it.
Just my two cents.