You seem to be 147grain reincarnated. If you are going to simply post others info you might want to understand it. Your comment ... (Rounds appropriate for self-defense in pistol, rifle, and shotgun all tend to penetrate building materials about the same.).. is FALSE. The big advantage of the AR is the high velocity causes the projectiles to penetrate less in standard building materials than buckshot,rifled slugs or common handgun rounds such as 38sp,9mm etc. As far as your claim the AR has better stopping power... compared to what? You really think a load of 9 or 12 00 buck has less stopping power than a 5.56 or 223 round?
Second point 147 is I personally gave Evan Marshall shooting reports so your claim he has no data is another lie.
You should have just stayed away as you got run out of town before on every gunblog