Abstract: Work pieces, particularly thin-walled shells of can dimension, are transferred from a magazine at a supply station to another station by a reciprocal shuttle having a pocket for receiving the shells in ready position at the supply station; at the other station, a reciprocal loader transfers the shell laterally from the shuttle to a work station where the work product is produced. The shuttle incorporates a second pocket to receive the work product and includes a surface for gating the supply magazine as an incident to shuttle travel. By locating the path of the shuttle above the path of the loader, it is possible to coordinate shuttle and loader movement for maximum utilization of time. Shells fed to the magazine are constantly aligned inside the magazine to assure effective bottom feed from the magazine to the shuttle.