There is no best home defense shotgun. Older Remington 870P. Benelli M4. Wilson Combat/Scattergun Technologies. Mossberg 590A1. The best one is that which is reliable and with which you can make the fastest, most reliable hits. And don't buy too much into the super tactical FliteControl stuff. Smaller (or wad-sized) patterns have pros... and cons.
Stop trying to sound like a shooter, go back to gobbling cock in the Greyhound station men's room, that's the only shot loads that interest you...
