Quote from LEAPup:
That's where my Ar-15 comes into use. 5.56mm, and VERY fast! Only the massive flack vests the troops in Iraq wear stand a slight chance. The stuff street cops and the modern thugs wear=no chance. Through and through penetration.
The only bad thing about the 5.56 is the fact that it shoots through walls, so not a great choice with numerous occupied bedrooms in the house unless extesively trained.
i.e., stick with the 12g with 3" 00 magnum. Ooh rah!
Oooh rah back to ya.