A device for storing projectile balls and feeding the balls into a projectile chamber of a gun is provided. A ball container includes a feeder positioned within the ball container for feeding balls into a feeder tube. A motor is configured to supply drive energy to the feeder. Operation of the motor is controlled as a function of the movement of the balls in the feeder tube. A spring element having a storage capacity is configured to store at least some drive energy of the motor. A slip clutch is configured to dissipate drive energy of the motor that exceeds the storage capacity of the spring element.