If 5.56 start dislocating joints for you (on the firing end that is) please seek medical attention for am immediate MRI to determine if you aren't a jellyfish.
I doubt that's what he meant...Wargamer 1985 mentioned the physics of elastic collision.
And please, it's Beowulf. BeOwUlf, not the other way round. Do you want a horde of wild Saxons burning down your home?
You do realize that with their high weight, if there is no more propellant than the 5.56, the bullets have a low velocity, resulting in not that overwhelming ballistics? They have decreased effective range and piercing. Their blunt power is fitted for hunting game, not war.
Do you work for the guy with the patent, or why are you trying to sell us those things as the uber weaponry?