This time I have to take a different approach

My last rocket started with pencil and paper and ran from there. This one I have to see if 1st is it even possible? Making my own rocket propellant seems like it would be a quick way to get me on a watch list so I talked to some ATF and police friends. Here in the state of Florida, I really won't get in any trouble with anything up to about 50 pounds of black powder. Even then to get in trouble, I would have to parade around in the streets letting everyone know I have a black powder depot. I have no ambitions of storing that much of any explosive so I'm good there.

Next on the list, what is black powder? Do rockets even use that anymore?
That's yes and no. While I do feel that by the end of this I will be attempting solid rocket fuels like the rubberized emulsions of ammonium perchlorate and aluminum as seen in the Space Shuttle's SRBs, I want to start out with the most generic black powder formulation and work from there. Just like any recipe there are conflicting ratios of ingredients but at least the ingredients are all the same.

Black Powder is Potassium Nitrate, Charcoal, and Sulfur. Mixed at a variety of ratios. So many that I gathered several formulations and averaged them to decide on the composition I will aim for which is:

Potassium Nitrate	72%
Charcoal	24%
Sulphur	14%

Now I just have to find out where to get the ingredients.