Well, I don’t have a shotgun house. But I do have a shotgun hallway leading to all of the bedrooms.
I have one of those. On the other side of the wall at the end of the hallway is the master bedroom closet, and the master bedroom door is right next to it on the adjacent wall. In that closet is a shotgun. My wife has instructions to lock the bedroom door, go into the closet and get the shotgun and if she hears anyone try to force that door, shoot through the wall.