The one cap you did not mention is the Remington#11. It is shorter that the #10 and will "bottom out" sooner and maybe let the cap primer compound get up against the top of the nipple when seating. Try the Rem#11s. They fit larger nipples and have more "give" than other caps like the CCI/WW & RWS with harder walls. They fit larger nipples than the CCI#11s.
It may be that the top of the stock nipples are larger in diameter than normal and that is preventing the cap primer from reaching the top of the nipple with any cap.
With over 15 perCUSSIN' revolvers, I've been called the Imelda Marcos of cap & ball.
SASS#3302 (Life), SASS Regulator, NRA (Life), DGB#129
Wolverton Mtn. Peacekeepers (WA), former Orygun Cowboy (Ranger, Posse from Hell)