Yes. No. and ..... TA DA!! Maybe. First one up for bids. The nipples stand too tall up out of the cylinder. Last bunch of 2d Gen Colt
51 Navies I worked on, accepted SlixShot nipples for Uberti. Little anti-seize lube and they spun right in. Function with #10 Remington
caps was just right.
With the too tall nipples, the hammer isn't being allowed to travel far enough forward to release and re-set the locking bolt. There are two
ways to solve the issue. Well, maybe three. Relieve the bolt arm at the cam, bevel the release side, re-polish, test for function. Repeat as necessary. 2. Pull the nipples you got from TOW, put em inna lathe, turn em down to the correct height, then re-machine the sides so #10
caps will fit again. 3. Return the incorrect height nipples to TOW. Fit a set of SlixShot and see what you get.
Before I would even think of doing #1 or #2, the incorrect nipples would go back to TOW.
Coffinmaker