content: Sure there is.  The entire point of 3200 Fps muzzle velocity is SONIC BOOM inside the flesh of the person hit.  Its not about the size of the bullet smashing a big hole, its about the fact its literally super sonic and causes "super cavitation" which actually creates a tiny cavitation explosion inside of water...and flesh is 70% water.   5.56 also tumbles the instant it touches anything, which is stupid-deadly at mach 1.2.   I mean also at point blank the ejecting gasses alone has the power to blow away flesh.    If you told me at 100 yards sure no 5.56 wounds be like this.   But this was inside of 5 feet.   Rifles are damn gnarly  as fuck, and a rifle loaded with blanks will murder at 2 feet or less.    Its also possible the rifle was chambered in bigger rounds too, like .300 blackout.