I've hunted black bear twice in British Columbia with John Sievers.

http://www.bchuntingadventure.com/about-bchuntingadventure.html

Reasonable distance shots... 200 yards or less. I took my first with a .375 H&H and my second with a .458 Lott.

I just hate being under-gunned. In truth, any good rifle shooting premium bullets (A-Frames, TBBC, TSX, etc.) will take down a black bear. My current love that I think is the perfect black bear rifle is the .338 Federal.