A large capacity magazine apparatus for spherical projectiles, such as toy foam balls that may be used in conjunction with a launcher. The magazine includes drum and clip housings and a rotatable sprocket with longitudinal flutes that together form a smooth pathway for the foam balls to travel in the magazine and to alleviate jams. The smooth pathway includes a helical path, a transition path and a linear path within the housings. A constant force spring provides a rotational force for the sprocket and a plurality of articulated rigid balls function to push the foam balls out of the magazine and into a firing chamber of the launcher.