I recently came across an 8 gauge Lefever. I obtained some brass shells. I found a recipe for loading with Black Powder. However, I cannot find Black Powder here in Hawaii. Only Pyrodex.
The company states Pyrodex can be used on a volume to volume basis as a substitute for BP. The recipe I have is in Drams (4 Drams BP for this load). I read that Pyrodex density is about 70% that of BP. That leaves me to believe that about 2.8 Drams of Pyrodex would be the equivalent of 4 Drams of BP.
Has anybody got any experience with this?