.223 vs. 45 ACP Data Point
Don't mean to stir up any trouble here but I did get to carry a 5.56 rifle for 18 months back around 1966. Location was the Central Highlands of Vietnam.
An Air Force sergeant at Pleiku AFB attempted to commit suicide by shooting himself with his AR 15 on my watch. Blew a hole in his side but, he survived and got an early return to the Big BX. Never could get enthused about that round.
He would probably have succeeded if he had taken on some of the black shirted farmers we had in the area who carried 7.62 x 39 rifles. OR if he had used a 1911.