I had a friend who worked in a gunshop a couple of evenings each week who had two Ruger Super Blackhawks. Remember when Elmer called that gun the Ruger Dragoon?
He kept one loaded and one empty. On Saturday evenings, he would strap on the empty one and try to outdraw James Arness as "Marshal Dillon" outdrew Arvo Ojala.
You know where this is going. Yep, he got the guns mixed up one time. He drew as usual. This time the color TV tube imploded, he could see grass instead of interior wall, the picture window was broken, and the bullet bounced off the driveway and lodged in the track of the opening garage door across the street. He couldn't hear a thing for some time.
The guy's wife had always criticized his fast draw antics as juvenile, and the guys at the gun shop were less than kind. "A guy who would do that shouldn't be allowed to own a gun."
Not long after that happened, the guy at the shop who had been most vocal took a brand new Remington 870 out of the box, opened the action, checked the chamber, worked the slide once or twice, put to his shoulder and---BLAM. The butt stocks of several Brownings on the upper level of the rack were destroyed.
The guy took the guns to the Browning facility in Arnold, MO for repair. When he explained what "someone" had done, the Browning guy said...
"A guy who would do that shouldn't be allowed to own a gun."
As I said---muzzle control.