Tried out the RWS caps yesterday and it was a complete bust...way too big. I suppose I'm not going to take stop-gap measures and just replace my nipples.
I got the gun sighted in pretty well as well...5 of 6 shots on a tin can at 45'. Not bad for only having 60 rounds through this Pietta 1860. In fact, I'm having so much fun with this whole black powder thing that I just went ahead and bought a Cimarron 2nd model Dragoon a couple days ago!
And a parting shot coming up the ridge near my shooting location...