Sparky, if I could get the real thing, consistently, I would. One of the problems with "mix 'n match" powders is that when you shoot, you develop loads you know will work at X-distance with Y grains of Z powder, etc...and as in metallic cartridge reloading, when you start playing the shell game, things aren't where you think they are.
I can get Pyrodex all the time, and I know how it's gonna shoot.
Sounds like you have a sweet setup!