The first shooting I went to on the job involved 1 guy shooting another using a 20 ga single shot with #6 low brass. Distance was about 15 ft. Check the distances in your home as far as room sizes. The guy was hit just below the ribs in the xyphoid. Cut a jagged hole about the size of a golf ball. Wad was inside him. Found shot next to the spine. DRT. Since then been to several hunting accidents involving bird shot. It kills dead and quick at close range, distances the inside of most homes.