What size caps for 1858 nma
Think the link probably answered your question. This may help also, or someone else.
As far as percussion caps are concerned, I generally resize about all of them ( with the exception of
CCI # 10's) as I like a tight fit. Drilling out one of the holes of a cheap automotive wire stripper works well , and fine tune it with a needle file.
Let's you take the time to inspect the caps to make sure all the " stuff "
is in there that should be. Checking by Chronograph, Rem# 10 are the hottest
CCI #10 is next and CCI #11 is last ( I've never checked the RWS and
Rem# 11's ). The Rem caps are a bit thinner metal and are easier to install
that the CCI's after resizing. The Rem# 10's are a bit taller and have 4 rounded legs that tend to hang up in some cappers. Using your resizer holder and taking a couple of short strokes with the needle file solves the problem.
Caps vibrating around in the tin ( especially on horseback ) tends to sugar
out the " wompum" over time. All caps I've tried are quite reliable if dry.
( We've soaked some in water overnight of each brand and after being dried out a couple days were completely reliable.) In foul weather some beeswax
softened a bit with neatsfoot oil ( the same as we use as grip wax on skiis) stuffed aound the caps and nipples makes things about as reliable as it gets( we tested that in water as well). Adds to the cleanup though.
Some of the primer sealers marketed for the same purpose don't work. Our policy has been to do everything possible to make it go boom every time.