Read the story, pack of bears eating two Russian miners.
http://www.foxnews.com/story/0,2933,390048,00.html

I think I would use a semi-auto rifle for this area...any other time, bow all the way.

a bow doesnt do much good with a pack of 30 hungry bears running around. i think the semi auto high powered rifle would work fine for me also.

No semi-auto....might jam.

I'm guessing all 30 bears weren't in a pack eactly. Perhaps some natural event (lack of salmon, especially dry year, etc) may have them seeking alternative food sources. Probably need to be harassed (with a few of the offenders killed) and all food sources permanently secured