Hidden, the fact that this source of yours states " Smokeless Powder (Pyrodex, etc.) is not to be confused with Black Powder. It is actually Nitrocellulose, and cannot be used in place of Black Powder.", certainly calls their credibility into question! I sure use Pyrodex a lot as a substitute for BP, which it was invented to be!! As a matter of fact, Pyrodex is NOT a nitrocellulose powder, nor is it "smokeless".