Think about a 20 Gauge. Would you rather be hit by a 12 GA or a 20 GA? I'd say neither, they'll both do me in. The 20 is a bit lighter and handier, less muzzle flash and recoil at 3 AM, shells are lighter to carry (if need be), and it covers a doorway, at normal CQC ranges, just as well as the 12. Testosterone not included.