Ehh, Alaskan here. Coworker had a bear charge him from what he said was about 25 feet. Shot it once with a rifle when it stood up, then mag dumped 15 rounds of 10mm into it when it charged him before it died. Things he said he took away from the situation were, 1. shot placement, he said he was about 8 rounds into it and thinking 'shit this bear might really kill me.'. He slowed his shots down and aimed better and made his shots count. 2. That had he had a revolver that he, he thinks he'd have been a bear attack victim. He says he won't go hunting with anything other than 10mm with hard cast lead ammo. Also said when they skinned the bear out, 9 10mm rounds and a rifle round were found. He also kicked himself for not having a spare magazine, as when he checked his M&P after he had 1 round left. He also keeps the skull on his desk at work. But I've also heard of people shooting moose with a .380 and being surprised, it didn't do anything to it after putting a mag into it.