A fellow Jail Deputy back in the early 70's was a reloader experimenter extrodinaire.
He decided for some reason that Road Flare powder would make a good filler for most of the empty space in his 38special rounds he was reloading. He expwected some dazzleing fireworks.
So with those in hand along with his brand new S&W Mod 37 3" revolver, he touched off a few at a range fest one morning before our 2-10 afternoon shift.

A sorry site that alloy frame revolver was.,,and a total loss.

We were all Jail Deps and had to supply our own 38cal revolvers.