A little file work on top of the nipple, and if it's to fat afterwords, a few second in a drill with a peice of sandpaper to skinny it down. Keep it simple.
Heres mine. I paid $400. used at a gun show 4 yrs ago, .62 cal 1-66. coned, L&R lock and trigger, Sharon barrel, and a Lyman .610 mold. It was built from a TOTW kit in the early 1980's.
Bigger is better, I hunt 120 lb. deer with a .62 flinter, 80 grains 2f, 340 gr. ball, it will shoot thru anything. As for target shooting, the bigger the ball the closer it is to the bullseye.Get the.54, you won't be sorry.
I have the same pistol, I put a cock on it from Pedersoli's Pennsylvania rifle Flinter, same lock, diff.cock. It went right on and it can be bent to change the angle.
I bought mine in 2008, at a local gun show. The gun was assembled in the early 80's. It is identical to the Lehman fullstock in the TOTW catolouge, other than the color of the stock and the brand of barrel (mine is a Sharon). I don't know why people build things and sell them for less than the...
$700.00 dollars buys all the parts in a kit from TOTW, you'll have a rifle worth in excess of $1000.00 when you are done. Myself, I would look at the used market, I bought a Lehman full stock flint in .62 cal., assembled from a TOTW kit for only $350.00 2 yrs. ago.
I also think leading might be the cause, I leaded up a .58 a few years back, real bad, using undersized minnies. It's not easy to see leading when you can only look in one end.
I clean mine with dish detergent and hot water, light coat of oil in the bore for storage. been doing it that way for 35 yrs. Keep it simple. None of my guns ever show rust. At the range a spit patch.
Pedersoli prices have gone crazy the last couple years. I don't think the quality justifies the price now. I own 2 of them, bought years ago for fair prices. For what they charge now, get a used custom or have one built for a few bucks more. I picked up a 62 fullstock flinter a couple of years...