I have this pair of F. LLI. Pietta 1863, .310 Caliber, 5 Shot, Remington Pocket Pistols, that from the factory had a problem with the depth the #10 nipples were set into the revolving cylinder.
The nipples, were, inset into the cylinder too deeply, and when the pistols were fired, half the time, the hammer would not strike the caps with enough force to ignite the powder charge.
It occured to me, after looking at and measuring the distances carefully, that the nipples were inset too deeply into the cylinders by about 1/32 of an inch.
As a test, I backed the nipples out, away from the cylinders a little distance of approximately 1/32 of an inch, and VIOLA, all cylinders now fired reliably and consistantly.
So... I toddled my lil butt down to home depot, and surveryed their small hardware section looking for some sort of item I could use as a spacer. I came across some very thin, and small, snipped #8 lock washers, in 30 packs, for $1.29, and I picked up a couple packs.
I spread, the snipped washers open, with needle nosed pliers, fitted them over the end of the nipples, and pressure fitted them down onto the base of the nipple for a firm, and locking fit. I then threaded them back into the cylinder.
The fit was a bit tight, and snug, but they did seat all the way down very nicely, sealing the chambers well, raising up all nipples, on all chambers, the needed 1/32 of an inch.
It works BEAUTIFULLY, and is CHEAP AS HELL.
I just thought I would pass that on, in case, any other Pietta owners out there may be having similar problems with their revolver(s), which apparently, Pietta is a bit nortorious for.
ElvinWarrior... aka... David