Stupid to make generalizations actually...
My Big Boy is 1/2 Alaskan Husky and 1/2 Timber Wolf.
He is totally unafraid of anything that walks, including humans, bears, cats, other dogs and pretty well damn near anything else.
And he is smarter by far than the average Two-Legs - FAR from "stupid".
I would MUCH rather have him in camp in Grizz country than an excitable hunter with relatively little experience.
Chase the bear? Hell No, he catches them if they can't get up a tree.
And the results are far from pretty.
As for the 270, I would be entirely comfortable packing mine into Grizz Country (and have many times).
Run Nosler partitions at 140 or 150 grains, and make the only shot or two you are going to get anyway COUNT!
Cheers,
Nog