ORIGINAL: robbcayman
... As of right now I would have no problem grizzly hunting with a 300 win mag.
I've used a BC outfitter who's been guiding in the Flathead Valley (prime interior Grizzly country) for 25+ years. He views the .300WM as the perfect rifle for everything (including grizzlies) in his territory. "If you buy a .300, you'll never need anything else".
If you're intimately familiar with your .300, then go forth & whack 'em!
FC