Treso or Slix Shot cones and #10 Remington caps are IMNSHO, best combination available. My curent competition Uberti '61 Navies are wearing Slix Shots and use Remington #10s that I buy 5000 at a time. I have no problems with missfires or cap jams.
Fingers (Show Me MO smoke) McGee - AKA Man of Many Colts - Alter ego of Diabolical Ken; SASS Regulator 28564-L-TG; Rangemaster and stage writer extraordinaire; Frontiersman, Pistoleer, NRA Endowment Life, NMLRA, SAF, CCRKBA, STORM 327, SV115; Charter member, Central Ozarks Western Shooters
Cynic: A blackguard whose faulty vision see things as they are, not as they should be. Ambrose Bierce