Had a great time shooting an old 61 Navy today. I had bought some tresos and this was my first time to try them.
Gander Mtn had some #10 Remington caps and all went well with no failures, jams, or problems at all.
The gun was a older Navy Arms Uberti with the XX7 date code so it is a few years old but it did take the smaller .375 balls with a little shave of lead. I read another post where .380 would be better but these were OK. I will probably order some .380's.
Overall was very pleased with the tresso nipples. Also, it seems the caps held together well.