I live in the relm of three kinds of Bears; Polar,Brown and Black.
Rule #1 regarding Bear stopping.
If you want to stop a Bear, carry a rifle..... or a 12 Gauge , it is VERY nice as well.
Rule #2
If you MUST carry a pistol, Remove the front sight anyway, when the bear greases you up with the Spray, it wont hurt so much when he shoves the pistol up yer butt.