RE: Grizzly Rifle
Are you hunting caribou and grizzly or are you just looking for a bear protection gun while you're caribou hunting? I'd recommend using either of the stainless rifles because September is the rainy season in Alaska. The 300 Win is plenty of medicine forarctic grizand the .375 could ruin quite a bit of meat on a 'bou. Caribou don't take much to knock down and frankly the bears in northeastern Alaska aren't usually all that big. Whichever one you can shoot better is going to be your best bet. I've hunted Unit 26 quite a few times and I've never had a bad run in with a bear. In fact nearly every one I've seen up there has been making a b-line for the horizon to get away as fast as possible. They know perfectly well that they're fair game up there.
AK Jeff