Posted by abber: My thought is, that if you are facing 5 assailants, there won't be a lot of aiming or even conscious thought about what you are doing going on. Also, at least for me, shotgun shooting is more intuitive somehow. I haven't used shotguns a lot, so I'm not what one could call a "shotgun guy", but I have no trouble hitting stuff with them.
Take a look at the pattern size of a shotgun at defensive shooting distance.
Yes, you will have to aim, or you will miss.