cheffy
Welcome to the Forum.
As you didn't say anything about having problems with mis-fires, go ahead and use up the remaining pellets.
The others are right though. The granulated powder will work better so when you buy the next supply get the Pyrodex P. The P stands for Pistol.
While your at the gun store buying your powder be sure to ask them if they carry REAL black powder.
They can't keep it on a shelf like the substitute powders so you have to ask for it.
If they do carry real black powder then forget about the Pyrodex and buy the real stuff. It will work much better in your gun.
I don't know if you've read about loading your revolver but it is highly recommended that after you have loaded the powder and ball into each chamber you should cover the mouth of the chamber and the ball with a lube.
Although there are factory lubes like Wonderlube 1000 and several others plain old Crisco (a white vegetable shortning used for cooking) will work just as well.
This lube not only lubricates the ball as it passes thru the barrel but it also seals off the mouth of the chambers to prevent any possibility of a "Chain fire".
Chain fireing is the term we use when the loaded chambers not in line with the barrel fire from the flash of the chamber that is being shot.
Also, make sure that all loaded chambers have a primer on them.
Many people feel that chain fires are often caused by a uncapped or loosly capped loaded chamber.
I know that with practice your accuracy will get better. One thing that may help you shoot your revolver better is knowing that all of the Civil War style revolvers were made to shoot high.
Knowing this and aiming low will probably get you hitting the target 9 out of 10 shots or better.