There are references and a few images of cartridges with percussion nipples sticking out the side which were used to convert LeFaucheux and LeFaucheux type pinfire revolvers to cap and ball, these cartridges are called “stovepipes.” The literature states that stovepipes were used during the American Civil War when supplies of pin fire cartridges ran out. One example I have seen in a picture appears to have been turned on a lathe from steel or iron. But there is reference to other forms of construction. Does anyone know of the other forms of construction? Is there any documentation of who made them?