Ironsaven,

I'll agree that the 12 can be loaded down, and if that's an option for the user, it could be the way to go. Of course, if the user can load their own, then they can creat just about any 20 gauge they prefer as well. And any reduction in noise, recoil, flash, etc. in a closed room is beneficial. Either way, make it a pump. While performing research some years ago for a crime thesis, I found that the racking of the slide was the deterrant. Not the gauge, etc.

Also, I'm a little concrened with your comments regarding non-lethal force. For LE, that could be relevant, but for private citizens it can get you into a world of trouble. In PA, you'd better not draw your weapon unless lethal force is required.