Re: Using pistol ammo-
Shotguns are made for a different order of pressure entirely. Guns that shot 410/ 45 Colt, like the Judge, were MADE to do that.
Got a half dozen or so of the single and bolt action .410s, and an 1100 Light Field in .410. Fun guns- and if you need to learn to be humble, go shoot a round of Sporting Clays with a .410