I used a weighed charge, 40gr. of FFG or FFFG. I've even tried FG, but 40gr. of that really soots up the gun. I usually use FFG, the FFFG almost seems too powerful. There is quite a difference. In my Winchester brass, I find that 40gr. is almost too light. The powder could do with a bit more compression.
To lube your bullets, simply lay a whole bunch base down in a disposable tin pie plate. Melt 50/50 beeswax and Crisco in a pyrex measuring jug, in the microwave. Watch it, do not over cook! Stir well, then pour it over your bullets. Let the lube harden, then poke the bullets out. With mine, I shoot as cast, no sizing. They come out the right size for my revolver, but remember, not all moulds and guns are the same!
I use standard Federal LP primers. I can shoot all 60 rounds at the range with no binding, but it's hard to hit anything at close range, since the revolver shoots much higher with BP. I found that 40gr. of FG matched the POI of smokeless loads, and FFFG was about 16-18" high at 25 yards.
It's really simple to load good BP ammo, no need for all the witches brews like "moosemilk", etc. If you live in a cold climate, you can add some olive oil to the lube, but it isn't really necessary. BP gets the revolver so hot, that really runny lube will melt before you even fire the gun! Here is a video of my loads in use. I also use BP in my New Service .38-40.
http://www.youtube.com/watch?v=aHjHZ8D6_TA