Superposed load
METHOD USED BY A FIREARM TO FIRE MULTIPLE SHOTS
Stacked charge; Superimposed load; Superimposed charge; Bullet after bullet; Bullet behind bullet; Bullet stacked after bullet
A superposed load or stacked charge or superimposed load is a method used by various muzzle-loading firearms, from matchlocks to caplocks, as well as newer Metal Storm weapons, to fire multiple shots from a single barrel without reloading. In a sense, superposed load guns were the first automatic firearms, as they fired multiple shots per pull of the trigger.