I think the idea behind the .223 was to wound with a shot and therefore take up extra troops careing for the wounded.The not thinking part was makeing the selector switch so no one recived a single shot but many tiny holes.
I have just in the last month or so read of a new round 458 something for blowing big holes durning close combat for the AR of the week. It appears the goverment has just decovered a new supper round for combat.No joke its basicaly the 45-70 with different case head.I would guess the new 7.62 NATO can't be far behind for these ammo inventing wisards.