I take I-70 when traveling east back home, and Graf and Sons is located not far off the interstate.
Since I'm already taking the drive, I can stop in to Grafs and pick up orders I've placed online. That way, I get to nix the costly hazmat and shipping fees for my real black powder.
You can call me a nut, a freak, a fanatical purist, but I just don't run anything but REAL black powder through my guns.
No, these days it isn't NEARLY as easy to find as Pyrodex and the other subs, but if you look around you can find it. Have faith, and get the real stuff.