Abstract: A percussion cap nipple for use with black powder firearms. The nipple includes a series of internal passageways that cooperate to produce a throughbore that directs the firing charge to the main powder charge in a fast and reliable manner yielding improved powder ignition. The base or exit end is flared to produce a wide spread of a greater quantity of sparks to the powder chamber. The inlet end is narrowed to form an anvil type end wall over which the percussion cap fits. This anvil cooperates with the hammer to assure positive detonation of the percussion cap.