A couple of years back, a pretty 15 year old girl was attacked and mauled by a black bear on Mt. Lemmon. It was some kind of camp deal for a group of kids. Anyway, one of the counselors had a .44 mag. in his back pack. He probably saved that young lady's life. The big problem up there, is the local residents were constantly feeding the bears and they had lost all fear of humans.
BTW. The girls family sued the AZ Game and Fish Dept. and the State of Arizona. The settlement was unspecified, but substantial. I don't know what the actual grounds were but they won.