I'm curious about what calibers/guns are common for home defense. Out of my current lineup, my HD weapon is my 12 gauge Grizzly Mag (12.5" barrel). This short barrel allows for easy movement through my home with a flashlight mounted up front. My choice will always be 12 gauge for the single shot devastation that no other firearm can produce. My backup gun (my wife's go-to gun) is currently another 12 gauge Remington 870.