just in case
I see you're from Alberta - I had the same dilemma last fall. I found a really nice mountain rifle for a great price in 7mm-08 and I wanted badly to put it to work.
The problem is, I spend a lot of time in grizzly country too. During hunting season, I don't want to carry a "stopper" as my hunting guy (I like to hunt with what I practice shooting a lot with, and my .375 and .416 "stoppers" give me a flinch after not many loads).
So I asked myself, "what's the most powerful hunting calibre I would take hunting in grizzly territory and still be able to, hopefully, with careful, cool determination and a bit of luck, be able to slow down a charging grizz long enough to take a follow-up shot?"
Neither the 7-08 nor the .270 is a "stopper", but if it came down to life-or-death, I would feel better with a stout 150-grain or 160-grain Nosler Partition in the .270 than any load in the 7mm-08. Others may disagree, but that's what it came down to for me.
If I wasn't such a wuss, and if I had more money to practice, I would think about a .280AI or one of the 300 mags, but for me (on a hunting weight gun) a couple of boxes in the .270 at a time and I can still hit what I want to hit, pretty far out. Anything bigger, and it's one box, or less, and that's not much practice when you think about it.