I've killed a grizzly at 35 yards & neither of your choices are a good backup gun for bear. Etiher of those will kill a griz, but that is the problem. The issue gets discussed all the time. The real issue is not killing a bear, but stopping a bear. Those are two totally different issues. My idea of a backup gun is very high powered handgun that I can fire rapidly at say 10 feet. I want something I can possibly squeeze off while I'm rolling around on the ground getting eaten.