A former college roomate of mine that liives in Johnston PA told me two bear stories one bear was shot with a 7mm but it took a 338 mag to finish it off. The other one was berserk during a turkey hunt took 1 copper turkey load from a shotgun, 6 from a high handloaded 357mag to stop, by the way they guy with the 357mag needed a change of shorts after the charge. My former teacher had success with a 300win mag all of these were on black bears. I gues its all in momentum and were your person is located when you shoot at any bear.