I just bought a cap'n'ball revolver. It is a Pietta- Griswold & Gunnison .36 cal. Modeled after the Colt '51 navy. I have never shot black powder and was wondering what/where to get powder. I ordered some Alliant MZ, without doing much reserch on the matter. After looking up to see if there was a certain grain weight that I should use due to it being a substitute, it looks like this might be a bad choice on powder to purchase. I understand that I need to be looking for some FFFG, like goex or some sort. But I am having a hard time finding it by the pound and to order over the internet. And If anyone has heard of the Alliant MZ, Is it safe to go ahead and use it or should I try and pass it on? Currently I am in Afghanistan, so just going to the local gun store is out of the question and want to shoot this pistol when I get home for leave. If there is any suggestions, I would greatly appriciate it.