For a great deal of the history of this nation, the private citizen was better equipped than government conscripts. Not anymore.
The military specification for M855, called for a round capable of completely passing through low carbon plate steel 0.135 inches thick at 656 yard for a reason.
Always aim for the head.
“Always aim for the head.”
Or the kneecap. That way you take two out of the fight. the one that’s knee capped and the one that has to drag his screaming butt away. :-)