Super short barreled shotguns are sort of like MAC 10 & MAC 11 machine guns in there usefulness. They have their place and uses within a narrow range of their limitations. They can be very effective for clearing buildings, and night raids but in open spaces are very limited.

As stated above birdshot is a good loading for home defense as it cuts down on over penetration in family dwellings yet inside room distances impacts as one solid mass.