5.56 ball shatters inside a body when fired at high enough velocities (20 inch barrel), but tends to just go straight in, and straight out, when fired at lower velocities.
No shooter as far as I am aware of used 20 inch barrel, and the mil-spec green tip rounds have a steel 'pin' in the design which makes them less likely to fragment/tumble.
5.56 ball shatters inside a body when fired at high enough velocities (20 inch barrel), but tends to just go straight in, and straight out, when fired at lower velocities. No shooter as far as I am aware of used 20 inch barrel, and the mil-spec green tip rounds have a steel 'pin' in the design which makes them less likely to fragment/tumble.