I put little faith in a handgun on big bear, or even on small ones if real trouble arises, as I had a bad experience myself with a .44. But the 10mm has always seemed a very good option for the autoloader fan. The best there is IMO. Caveat being the use of cast bullets. Glocks are reported to have problems with cast bullets. Maybe a member can elaborate. I do not own a Glock.

There are days when I have mulled over selling a few handguns and getting one myself, but bear here do not typically cause trouble unless and occaisionally when hunting them and then the rifle is preferred. My other handguns do very well for my purposes, the .357 SIG being a favorite of mine. No bear taken, but it works very well on 70 to 200 lb butcher sheep, coyotes and dogs and would suffice for a closeup wolf in the event...