From looking over it the first thing I notice is the cylinder has a slight bit of play even when the hammer is ****ed. It just wiggles slightly. Is this normal, or should it be perfectly still?
This would worry me also. My black powder revolvers lock up tight, even when not c0cked. So I suspect something is wrong with that revolver. I would have it checked by a gun smith.
The other question is how much powder should we fire in this thing? Is Pyrodex safe or do we want real black powder? What type of bullet should we use? Do you load it like a modern inline muzzle loader with a sabot, or do we use a round ball and patch? I'm unfamiliar with that technique so I guess if that's what we do I need to read up on it. Also, if using real black powder is it safe to measure it out in a volume type measurer or should we weigh it?
With that small of a caliber I would guess it to be a small amount of 3f powder. I personally would see if I can find loading specs on that caliber. My .44 caliber has a max load of 35 grains. I shoot 20 and that is fine with me. I would suggest much less then 20 in that revolver. Also while Pyrodex P works fine, I like sub powders like APP 3f, JSG 3f or Pinnacle. Personally I would suspect a 10 grain load would be safe, if the cylinder did not wiggle. It should shoot a roundball. Which one I am not sure.
To load, you dump the powder (by volume) in to each cylinder. Then place a wad (if you like) on top of the powder. Or place the ball in the top of the cylinder. Using the loading arm of the revolver if you have one, you compress that ball all the way down the cylinder to where it rests on the powder charge. The ball should be so tight that the cylinder actually shaves the lead ball a little. Then using something like bore butter, Crisco, or some semi solid lube cover the ends of each cylinder. This will keep it from chain firing. If you have a chain fire you will never forget it. This revolver might have had one as that will stretch the cylinder rod and make them "wiggle." I got rid of the only revolver that chain fired on me because it did damage the revolver.
I will also guess that it uses #10 caps and not #11 caps.