Originally Posted by
Boz330
Here is how I do it, break up pucks, then grind in coffee grinder, sift through different size screens for grade I want. Anything too big goes back through coffee grinder and sifted again. For me 3F gives the best accuracy and velocity. The screens are 16, 20 and 30. That is openings per inch or 25.4 MM.
By using the pressed puck method you get a denser or more energetic powder. In a muzzle loader you can load your screened powder by weight and get good velocity, it just takes up more room in the barrel.
Bob