I've killed a truck load of feral hogs at the Ranch with my Glock 20 in 10mm. Some of them just over 400lbs. I figure they are probably as hard or harder to kill than your average size black bear.
I wouldn't think twice about shooting a black bear with my 10mm and the Buffalo Bore 220 gr LFN cast bullet loading.

"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"

~Molɔ̀ːn Labé Skýla~