"They also made the Tap-Cap to make percussion caps. Don't know what they suggested for priming compound. As you might expect, I don't remember the maker and can't find them in any of several Handloader's Digests."
They suggested using the caps that are used for toy guns for the primer. If I remember correctly, they suggested using the ones made in the US because they had more bang to them. It is in either the current midway usa or midsouthshooterssupply master catalog. If I find time to figure out which one I will post the page number.