This is not a debate about revolver and ammo use as back-up in bear country, just an experience I recently had relating to a Winchester load with 380-grain wadcutter bullets (copper jacket, flat lead nose up front). Last year I had my .454 Casull loaded with Freedom Arms 260-grain bullets (I believe), but a friend of mine had some Winchester 380-grain loads, and he handed me 10 rounds. This year at the campsite I decided to check the revolver's sight (just to make sure with one of these bullets, and shot an empty one-gallon plastic paint can from about 20 yards. The bullet hit the can, and traveled perhaps 10' along the top of the moss without hitting dirt. I decided to follow the mark of the bullet on the moss, and found the bullet's jacket, but not the lead. I was surprised, because the jacket was just dented or deformed, but otherwise not in bad shape. It seems that this is not a bonded bullet, and I have no idea if it's the best choice for bear country.
I decided to buy a box of Corbon High Velocity 380-grain hard-cast ammo. It was expensive, but I have complete confidence on these bullets. I shot a moose though the lungs with this bullet from about 20 yards away (a moose that had walked away and bedded after the shot from my rifle). It put a huge hole on the moose, and stopped on the hide near the base of the neck). Needless to say, I feel a lot more confident using ammo with hard-cast bullets these days.