August,
I don't load blackpowder in my pistol ammo much anymore. When I do, I use FFF Goex or Elephant and yes, it is fun to shoot. however, I should have mentioned that I'm interested only in smokeless loads and in particular something with W-231. Trailboss works very well in my .44-40 and I'll use that in the .38-40 also, but I have some great rifle loads for both calibers using W231, but nothing for the .38-40 pistol.