Can you legally carry a pistol during bowseason? We can't in NY.
There are two 10mm Glocks, a full size one and a not quite as huge one. I've never shot a bear with a pistol, I don't know if 10mm would do it or not but I guess out of hte glocks that's what I would use.
I think the nicest Glock is the Glock 19, which is the middle size 9mm, they make the same size pistol in 40 and 357 sig also, I don't think I would choose any of those if I thought a bear was going to chomp on me.
I carry a Glock 36, the smallest 45, when hiking, but honestly that's for problems with people. The black bears around here are rarely (almost never) aggressive, but if one was mad at me I would want more than that little 45, even for a little black bear.
We did have a black bear downstate NY kill a baby a few years ago. Some folks from NYC were up at a camp and there was a baby on a porch of a cabin in their group of cabins. The bear came at one side of the camp and the men (to their credit as they were unarmed and I am guessing had rarely left NYC before) chased it off, but it apparently did that to lure them away, circled around the campsite and dragged off the baby. Damn tragedy.