This past year I began casting my own bullets and making my own cartridges for both a .36 cal Colt and .577/.58 cal rifles, a p53 Enfield and a 61 Springfield (all reproductions). Doing so made me wonder why muzzleloading cartridges for rifles were not fashioned like revolver cartridges, i.e. to be loaded with powder and ball as an integral cartridge of either paper or maybe linen. Wouldn’t doing so save time and increase fire? I did some online research but I found neither evidence that it was done nor reasons why it was not. Perhaps one of you brilliant, knowledgeable folks could enlighten me?