I just learned about these a few minutes ago. Had not heard of them before, but it looks interesting. Mixing the powder with nitrocellulose glue and forming a pellet in a mold. Then glue that to the back of a bullet, wrap the junction with a bit of silk fabric, and paint the whole thing with a thin glue mixture again. Apparently it works, and you can even soak the cartridges in water and they still work. I don't want to go through so much effort for revolver ammunition but this should also work in the Sharps rifle, and probably could be used to make pellets of powder for anyone who likes those for use in a muzzleloader. I'm going to have to play with this and see what it does. He did use 4% by weight of thin glue (4:1 glue/acetone) in the actual powder charge. 3 Rivers Archery sells nitrocellulose glue.