Howdy,
A number of folks shot C&B pistols. If you also shoot BP in your rifle and your double barrel,then you'd be competing in the Frontiersman class. Most clubs,including mine,allow you to charge the chambers with powder and ball while at the unloading table. The gun is only capped when at the loading table just before you shoot.
There are a number of type of C&B revolvers you can choose from,from .36 Navies to the big .44 Walkers. Get a
Dixie Gun Works catalog. They have a large selection of C&B pistols as well as all of the neccesary accessories you'll need(lead balls,wads,powder flask,capper).
Enjoy the Dark Side!
Bellicose Bill