I have used Pyrodex with great success! That was until I became a member here and was told to throw it all away, burn it, bury it, but never, ever put it in your guns!
Too each his own I guess. I have Swiss FFF royal black that I save for my flint guns, Pyrodex and Triple 7 for my cap guns, and have had good luck with all. Proper loading and cleaning go a long way in successfully using BP substitute's.
Do you know that the man who invented Pyrodex died in a Plant explosion many moons ago.
A word to the wise should be sufficient!