Really guys, the best thing you can do is know your home and spend the time to do the real research on what is best. The rules still apply when you're shooting in doors, know your target and what's behind it.

I can stay that after years of believing that a pistol or shotgun was my best choice, I learned that the rifle that I have the most trigger time on and the best muscle memory for, happens to be in a caliber that is the best solution for my need.

Kelly nailed it, and I really began to wonder if the misconceptions I previously had are the same ones that many of you hold. 5.56/.223 is more probable to be the better solution over your shotgun or .45/9mm in doors. But do your own reading and research.

As usual, a gun in hand is better than not in this "situation"