Never shoulder a short barrel shot gun. Anchor the sucker on your hip with two hands one on the grip and the pother on the
back barrel.Wear thin leather gloves.
Oh, but you won't blow your left hand off because you're special in some way? Okay, maybe so but guess what your stupid BIL is gonna do right there in front of you when you let him shoot it, and guess whose fault it's gonna be?
18" minimum. No muss no fuss, no federal fee.
now he has to say, “Hold my beer”, for everything he wants to do...
Also somewhat dangerous is holding a revolver the wrong way. As a kid I fired a 44 mag and with my left hand holding the revolver between the cylinder and barrel simply because it was so heavy. When fired hot gasses came out through the small air gap between the cylinder and barrel.
Some minor burns and gun powder stains resulted.
Never again.