I've been shooting muzzleloaders since around 1979 when I built a Thompson Center 54 caliber Hawken kit. I used both BP (Goex) and Pyrodex. I much preferred the Goex. Fouling was softer and cleanup was easier. Pyrodex also fouled the bore faster with accuracy degrading very quickly in any rifle I used it in. When I began loading cartridges with BP in the mid-1980s, I again used both Goex and Pyrodex (all that was available). But, I found again that Pyrodex was much harder to clean and flash rusted my bores... It's quite disturbing to clean a Shiloh Sharps and put it away in the safe, then come back the next day with a light coating of flash rust all down the bore! When I shot Goex thru it, all I needed was to rinse out the bore with hot water, then coat liberally with a lube that stayed in place. With Pyrodex, I'd have to come back the next day and clean it again, usually at least twice more. My last opened can of Pyrodex went directly on the flower garden. I've won several cans over the years... I refuse them. I recently bought a case of 3F APP to use in my pistol caliber cartridges when my supply of Goex Cartridge runs out. It seems to work well, and cleans up just like my Goex Cartridge. In my C&B firearms, I'm only using Goex 2 & 3F as appropriate. But will have to change to another BP as my supply runs out.