Back up handgun for surprised target game animals OR back up handgun for surprised dangerous game animals ? Huge difference. For intended game animals the big bores fit the bill as you'll have plenty of time for the shot to be on target and if not, the worse case scenario is, the animal walks off. Recoil and follow up shots aren't a consideration. For the Mama bear protecting her Cubs or and angry territorial bear, the manageable auto pistol is a consideration. Certainly not saying a 400 corbon, 10mm or heavy 45 acp is good bear hunting medicine. I believe they'll kill a bear easily with good shot placement BUT much better options for hunting bears. For a bear in attack mode, the fast, accurate follow up shots from an auto with heavy penetrating bullets IMO Trump's a heavy recoiling revolver with 5-6 shots. Bears move fast so shots will need to be fast. Don't see the big revolver putting shots out fast AND accurate. The auto will put out 3 times the shots twice as accurate as the big bores. These are my opinions only. I've carried a 44 mag in bear country back packing mountains on elk hunts. Never had an issue. I now carry a 10mm with heavy loads. I Hope to never have to prove which gun would have been best. I think either choice is good but everyone has a choice and not all ours are the same. Another consideration is carry location. Chest carry is my choice but some still prefer waist carry. Lots of variables to consider.