It’s big, but the SW Governor with three buckshot and two Liberty .45 LC seems like a stop everything right now kind of gun. You could even load the first chamber with #4, now the assailant is blind, has massive pain, and probably is considering options other than continuing with the previous agenda. Now you have time and five shots left.

Considering bear country, I’d carry nothing short of a lever action in 45-70 with a pocket full of shells, even so, good luck. An angry Kodiak is a truly terrifying animal.