Why I have not even tried BH209 (or T7 or pellets or ...)
1. Swiss is my powder of choice and it is too expensive most of the time, so I use GOEX. I learned to shoot with Gearhart-Owen.
2. I don't hunt primitive seasons, I am a primitive, neo-luddite hunter.
3. I like the smell of rotten eggs.
4. Swabbing between shots slows things down; makes shooting a couple of groups an afternoon afair.
5. BH209 or pellets look stupid in a flintlock pan.
P.S. Bless me father for I have sinned, I have used a couple of pounds of Pyrodex.