given mag buckshot, pump action, no ear protection,TYPICAL shotgunner, top man on the CAR-15. a "can" on the 223, along with optical sight. Start the dummy with the shotgun at his dummy port arms carry, start the 223 guy with the far less tiring, faster "low ready" carry, safety engaged, finger outside the guard. The canned CAR is THAT superior, speedwise, if you put a bit of work into mastering it. There isn't any POINT in mastering the shotgun, because what it CAN do is so limited in any practical application.