People laugh this off. But if a 9mm with suitable bullets will drop a grizzly, then a .327 should do it. You either get a central nervous system hit, or you don't.
If you don't, a .338 could leave you waiting for results.
I never had to stop a grizzly although I worked a a remote site in AK where a foreman asked me to bring my 18" 12ga double to work every day. The only job where that's happened.
BTW what's the ME of one piece of unaimed 00 buck? How is throwing nine them in a bear's general direction better than aimed fire with a hot .32?
I would feel pretty naked with a small/med revolver going pop-pop as a bear got closer. I've been there with a badger that kept rushing as I emptied a .45 into him and remember the stupid feeling as the slide locked open and he was 20' in front of me and still coming. He died moments later from multiple hits.
How many aimed rounds can you get off with a .327 vs a .475? Twice as many?
That's double the opportunity to brain the bruin.
https://www.buffalobore.com/index.ph...uct_list&c=108