This bring back memorys for me, i knew an old poacher that went by the name of gypsy pete. I remember him showing me is rifle that was small enough to put under his coat, it was some kind of pump up under lever and he had a wooden mould for making bullet shaped pellets that where around the same size as a 22 bullet. He reused the same pellets after shooting with them. He just found the pellets in what ever he killed and remoulded them in his little wooden mould. Wish i knew what rifle it was, it was really old yet very handy.