Take a 60 gr Nosler Partition softpoint thru your thigh, obliquely, thru 11" of muscle, and see how much walkiing you feel like doing! :-) You are going to see about a 3/4" diamter wound path, not 4mm. :-) By the way, many such minimal wounds were seen caused by the Ak and by 06, 308, 7.7Jap and 8x57, too. That's just the inefficiency of ball ammo as a type.