I keep a pair of muffs next to the handy shotgun. I'd like to be able to hear the nice police officers after the event.
/johnny
You've made a couple of good points so far (shot size and ear muffs).
The NRA published a study they did a few years ago that number 7 or 7 1/2 shot would stop anybody within a room size area, and would not penetrate the other side of a drywall wall. I just read about keeping muffs with your gun, to minimize your disorientation after the gunshots. I've got to do that myself.