I believe, you mentioned favoring a large capacity semi auto for home defense. The rationale, as I recall, is no concealment problems and you will probably not be wearing an extra mag, if awaken from sleep. I certainly concur with above thinking and my night stand pistol is Sig P226-40 cal with 15 round extended mag. However, for carry purposes the single stack autos such as the Sig P239 conceal and carry better and we can carry extra mags. So to my question, which will probably not have a definitive answer. In gunfights you have analyzed, where the good guy empties his single stack mag and the fight is still on, how much of an opportunity did he have to reload? I am assuming, if fight still on at this point, the participants will not be at arms length distance, even if they were at the begining. If the participants have scattered and are behind cover, running, jumping around, but still in the fight, I can see where you would potentially have time to reload. But if at 20 feet or less, I think you would be in big trouble, if you needed to reload.