The Glock 20 and 10mm cartridge is becoming very popular with western guides and bowhunters as a bear backup. 15 rounds is very nice to have if needed. I switched to one, leaving my .44 SBH at home because of the weight factor.
If you plan to carry one while bowhunting, be sure to check you state regulations. Some states prohibit carrying any sort of firearm while bowhunting.