i got some caps at the local toy store, and i must cinfess that i put three caps in each cup. i then left the revolver loaded and locked in a case for about a year. all six cylinders fired without a stutter, so i guess my experiment worked.
fwiw, i agree that making your own is a pain in the neck and probably not worth the time, but there may come a day when we're in a position where we have no choice. (insert political tirade here- jazz it up with foul language and vieled threats against various governmental officials, throw in a good dollop of plain old sedition, and you've got a well considered and strongly stated opinion, or a tirade, depending on your perpsective)