Between the guides, two of which are here on CGN including Hoytcanon, and Dogleg who can run his own hunt and hunted here too, and myself at the outfit we’ve had a half dozen serious Grizzly encounters in a massive cumulative time afield between everyone. Serious to me means charges or serious aggression inside twenty five yards, and there have been too many to count 5-15 yard no-charge run ins and posturing both in hunting Grizzlies and encountering them during hunting other species.
None the chambering would have had any effect over. I imagine 2019 could bring new excitement but I’m far more afraid of the rivers and ocean, and the mountains than the Grizzlies, and there are more Grizz here per square km than anywhere else in Canada. I’ve been on the river days where we’ve seen twenty in rifle range, mostly sows and cubs to be fair, but those are the ones that have a chance of making things more interesting than you desire. Your brain will save you long before your gun, your gun can often get you in more trouble. Anyone who’s hunted goats or sheep with a heavy magnum will know weight puts your life at greater risk in the mountains than bears do.
The one place I like a .375 is when I had to follow up a shot Grizzly that didn’t drop in sight, and went into the three yard visibility devil’s club etc. This said I can shoot those guns instinctively and practice that exact type of shooting, carrying a .338 or .375 with a scope on it and a 26” barrel is going to put you worse off than a quick pointing .270 or what have you can actually aim in a hurry. The benefit to the Glock for me is I never put it down, no matter how thick the bush or how steep the slope. I have no illusions about it dropping Grizz on the spot it’s a last resort, and a welcome one, that is miles behind a .243 as a bear gun.
A heavy and big caliber certainly helps For your imperfect your shot placement. In an emergency and In a hurry, you do not have the certainty to make a perfect shot. Big calibers DO help!!!!!
I shoot and build big guns religiously, but no, for most folks they just get in the way frankly.