Abstract: A novel cartridge for conventional shot gun and other weapons, suitable for training and other applications, and containing a thin-walled ball encapsulating a substance to be ejected upon the ball hitting the target, provided with a folded fan enclosure for the ball and its holder within the cartridge which, upon expulsion of the ball-holder-fan unit upon firing, causes the ball to separate and continue to the target, while the folded fan segments spring open in free flight into an air-resistant disc and then pinwheel with the holder harmlessly to the ground within a short distance of the gun.