Decades ago I developed a flinch shooting 7mm TCU out of a 10" barrel Thompson Contender in IHMSA competition. A buddy helped me lose it with less than 50K rounds.

. Using a .22 barrel, he would load the gun out of my sight. Randomly, he wouldn't load it. I never knew if it was loaded or not when I shot practice rounds with Russ. When I tamed the flinch with the .22 we went to the competition rounds and repeated. The same procedure would work with a shotgun. Ever see a man with a shotgun flinch pull the trigger on an unexpected empty chamber?

Gil