Yes, it is possible to make black powder. Have done it many times for my bomb disposal classes. Got antsy every time i made the stuff. You end up with just that-powder. It will not stay mixed very well:It wants to separate into charcoal, sulfur and nitrate.It isvery hydroscopic.Black powder is very sensitive to static electricity, friction and sparks.It's called "serpentine powder" and does not have much power. In old time cannon much of the force ofit's burning was vented through the touch hole.

It is very impractical and very dangerous to make grained powder. It has to be mixed with water to make a paste.It is then rolled by a large heavy stone or metal wheel until dry. Then it is broken up in small pieces and sieved.It is in the rolling and breaking process where things go boom.

Parts of Delaware and MD are still littered with the remains of DuPont black powder mills. Making black powder now days is a good way to be accused of terrorism.

Take cayugad's word for it, itain't worth it.

"The problem with making powder is; It is a dangerous hobby. We had a plant called Badger Ordinance which was made explosives and powder for the second world war, and they were always having things blow up. Even under strict conditions, accidents can happen."