I know it's late, but thanks, Annie Lee! You too, Slim! I had lost track of this post!
Just to clear things up: I shoot ONLY BP out of my Colt clone for NCOWS. I tried shooting BP at one GLF&MC match through one of my Remington 1875s, but until I can buy/cast some of those BigLube (tm) boolits, I'll stick with the Colt or one of my C&B pistols.
When I get the chance to shoot SASS, I shoot mostly BP, and often thru the Ruger and Colt, but sometimes I'll take both of my '75s and shoot (shudder) smokey-less in them.