I have a 12 gauge shotgun in the bedroom for my home defense gun. If I can hit a rabbit that bolted. A squirrel running down a treelimb. Or a.dove zigzaging. I am certain I can center a man in the hallway. I feel pretty certain #4 Buck will end the threat at < 20 feet. My 90 pound German Shepherd dog that sleeps at the foot of the bed will have them bayed when they come in. She hears things out in the street and yard that we could never hear. I keep my shotgun in a rack I built 30 years ago for the purpose. I hope I never have to try it's effectiveness.