There are some ballistic wound studies the US Army has performed that point to both 7.62 NATO and 7.62x39 are less lethal on unarmored targets than 5.56 NATO and a number of other smaller calibers due to overpenetration and lack of yaw.
There are some ballistic wound studies the US Army has performed that point to both 7.62 NATO and 7.62x39 are less lethal on unarmored targets than 5.56 NATO and a number of other smaller calibers due to overpenetration and lack of yaw.
If I remember correctly the initial M16 enhanced lethality claims vs the M14 were due to Colt not having machine tolerances for making the barrel 1:12 but just lied and made it 1:16 causing the bullets to hit targets frigging sideways