In this thread I reported on having real problems with fired caps pulling off and causing mis-fires.
http://www.cascity.com/forumhall/index.php/topic,42306.0.htmlI mentioned that I'd talked to Track of the Wolf about their new stainless steel nipples, and that they were touting them as a lower priced alternative to Tresco's Ampco nipples. I ordered a couple of dozen and I said I'd report on how they worked.
I shot the 1862 Navy today with the TOF SS nipples and had zero cap jams.
Here is what they look like
The stock Uberti is on the left, the TOF SS is in the center and a Tresco is on the right (The Tresco is for a Pietta, so it doesn't exactly match the TOF SS nipple).
As you can see, the TOF and Tresco nipples have wider, but shorter cones than the stock Uberti nipple. Both aftermarket nipples need #11 caps, while the stock nipple used #10s.
Looking under the hood. The TOF SS nipple appears to have a flash hole about the same size as the stock Uberti nipple, while the flash hole on the Tresco is noticeably smaller. Because the TOF nipple has the same size flash hole as the stock nipple, I did not expect better performance out of it. But I was wrong. It completely stopped the cap pulling issue.