I did manage to discover how to put a lot of holes in a wide area, at a training session once. I inadvertently put a buckshot round into a shotgun with a rifled slug barrel. The spin imparted by the rifling produced a donut pattern in the target. My instructor sarcastically congratulated me on discovering a "hostage round" -- point gun at hostage and take out everybody around him
LOL! One of my fellow range instructors once told a young Marine to "get his face tight against" the butt of the Mossberg pump hew was fam firing, and when the whistle blew, the lad brought the butt up against his chin instead of his shoulder.
Ouch!