I am in Germany and to buy powder for reloading we have to take a class and get a permit. I took, some 30 years ago, a combined class for reloading, muzzle loader and blackpowder cannon. During the 2 day class, we learned the basics of rifle and pistol reloading, made some rounds and took a written exam. The muzzle loader and cannon part involved an exam as well but also quite a bit of shooting both rifle and pistol, casting bullets and a lot of safety stuff. After passing the classes you will get a permit to buy powder, in my case all sorts from NC to blackpowder. But the real learning started afterwards. The first bunch of crushed cases, flipped primers and spilled powder and rounds too long for the mag. Buying crappy equipment and spending money again on now good equipment... been there done it all. But one thing I have never ever done in over 30 years, I never had any kind of accident. So as much as I hated to send time in the class room, I guess it was worth it.