Backcountry guides advise not attempting to shoot at bears at all - it’s the least effective way to neutralize a bear attack. Bear spray is what you should be carrying - two cans, in case a very pissed off bear finds you again before you get to safety.
Most people think they are a much better shot than they actually would be in a crisis situation. Even police who practice routinely often struggle in crisis settings. This is why all the ideas about arming teachers and other civilians as a means of defense against suicidal mass shooters is insanity.
Nobody but military and law enforcement need to have ownership or possession of assault firearms and large capacity magazines. All the arguments to the contrary are specious.