Abstract: An automated device that separates out desired shells from a batch of mixed shells. The device allows an operator to gather all spent shells from a shooting range, for example, where many different caliber bullets have been fired, and have all the shells separated by size, or caliber. The preferred embodiment provides for includes a container with adjustable slots in four of the container's sides. An electric motor is also provided that is used to rotated the slotted container. The selected shells fall through the slots into a shell catcher. The sides can be removed and replaced, to adjust the slot size, or container sides with adjustable slots can be provided.