To this day one of the reasons black powder is difficult to find in many areas is the frequency and ease of the production facilities to blow themselves up!
I flirted with keeping the "makings" for my own black powder a while back, then realized, if I can store the makings why not just store more powder and eliminate the danger of production?
And if I can store more BP why not just store more smokeless, which is safer and gives better performance and more loads per pound?
Since I keep a good supply of "regular ammo" my BP use is entirely recreational, so a huge supply, at least not more than the legal limit, is not necessary.