If I was going to be facing Brown bears it would be with a .375 H&H or bigger.
45/70 lever for me
And what would you do if the bear you just hit at 40 yards was cresting the hill 250 yards away? Back-ups sometimes have to shoot a lot farther than ideal...
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.