Mattw;
OK, let's do the numbers. A very reasonable energy figure for a .22 rimfire is 100 ft lbs of energy at household distances. Forty grain bullet at approx. 1100 fps will do.
Let's contrast that with a 125 gr bullet from a .357 magnum traveling at 1400+ fps. In this case, a very reasonable figure will be 550 ft lbs of energy.
Then, please consider that the armor is going to make it almost certain that a maximum energy dump is going to take place; no overpenetration considerations here.
Therefore, my thoughts are that no matter how hopped up the invader may be, he's not going to be effective after taking C.O.M. hits.
A typical ball-peen hammer weighs 1 pound. I wonder what the energy level is when we give a gorilla a 4lb machinist's maul & let him swing for the fences? Or, who's willing to put on body armor, lay on a concrete floor & let a 10 pound weight be dropped on their chest from 55 feet above them?
Why, I think the force of my argument may actually sweep the B/G off his feet!
900F