I have always used #11 CCI, except when European #11 caps were all that was available. #10 Remingtons just were hard to find, while #11 caps were easy and universal for revolvers and long guns.
I still have some of these from the 1970s in my stockpile and they still fire just fine.
Pinching CCI #11 caps has always worked fine for me for C&B revolvers and stock nipples. But, if you are using shiny and smooth aftermarket nipples, the odd one might slip off.
Incidentally, I have always had great success with Italian factory nipples in my revolvers. I often read that that you absolutely must replace these with superior aftermarket ones.
But, unless your revolver is a Colt open-top design (1851, 1860, 1861.....) for which Slix-Shot cones help to prevent cap jams in the action, it won't matter.
Top strap designs don't seem to have this problem.