Ok, you know what a shotgun shell is, right? It's a bunch of little bb's that are packed in tight, and when fired, the casing opens up and they all scatter. Not very great range, but if something is within range, it'll probably be mortally wounded (depending on the tightness of the pattern). Anyway, replace those bb's with rock salt. Now, instead of getting deep, gut spilling penetration, you get the full blast, and only skin penetration. That means two things: you're getting knocked flat on your back and when you wake up, it's gonna hurt like hell.
Watch Kill Bill #2. Salt shot is used on there
