For quite some time I have been using a 9mm or .45 acp as my nightstand gun, but as in most cases a handgun is used to enable you to get to your long gun. In my case it would depend on the level of the threat so I keep a loaded AR and a 12 gauge shotgun in my unlocked safe nearby when I'm sleeping. Many people rely on a shotgun for home defense and surely a good argument can be made for its effectiveness in that circumstance. A big plus is that it's less likely to over penetrate and hit a neighbor's home. That's not a huge factor for me as my closest neighbor is about 500 yards away, but I still load my cylinder bore 12 gauge shotgun with #4 or #1 buckshot. Any in home encounter, in my case at least, is likely to be 7-10 yards or less. For those of you that choose to depend on a 12 gauge, what ammo do you load it with and why did you choose that type?