I would back up Daryls claim of packing a good blade. In the above mentioned book the author points out that in most the stories of survival against a black the difference was a knife. Often the side attack will knock your firearm away then you are on your own. A good knife, strength and hopefully lots of experience bar room brawling as a young man is all you've got left in the whole world.

Best idea is to kill him when he presents himself front on as Daryl stated they will often do.

Most people are very poorly educated when it comes to bears, especially the blacks. It all stems from the fact that they are generally not hard to put down and most often just spook when they see you. Make no mistake though no matter what anyone tells you, when you enter their domain you may be lunch and you won't hear that side charge coming till it hits. Their ability to move silently has to be experienced to be appreciated. A fellow hunter said it best "They are the ghosts in the forests".