A percussion cap isn’t complicated. It’s simply a small metallic ... and are likely more corrosive than commercial caps, but if you’re shooting black powder, you’re already well schooled on the need ...

include round balls; Pyrodex, the less-volatile form of black powder that can be sold in stores; and percussion caps. Most sporting goods stores that sell firearms will carry these items.

Press a percussion cap onto the nipple of each unloaded chamber without loading any powder or bullets. Reinstall the cylinder and fire all five caps downrange. This cap-only round blows out any ...