Yeah. A brown bear at close range surprising you can be a deal braked for a pistol or a cannon for that matter you kill the bear as it kills you.
Bought my youngest son a Marlin Guide Gun in 45-70 that I can load up to .450 Marlin pressures. I load it heavier than stock .45-70 velocities but not maximum. In deer country more is unnecessary. But there is a reason it is called guide gun. Big fat bullets in a quick short barreled rifle is perfect for brown bear country. Though there is something to be said for 12 gauge slugs.
I load his loads in nickle plated cases so as not to use them by mistake in my 1884 trapdoor.
“Bought my youngest son a Marlin Guide Gun in 45-70”
You are a good dad.
If I move to the mountains, that is my next purchase.