The Lee Precision Universal Case Feed Magazine automates the case feeding operation on the Auto Breech Lock Pro, Pro 1000 and Load Master presses. It ships with four clear case feed tubes, Case Slider Block, Riser Block for taller cartridges, and Small and Large Feed Plate and increases production during the reloading process. Pro 1000 press owners: Your existing Z-Bar and Bent Z-Bar will work with this new Universal Case Feeder. Load-Master press owners: Your existing Crank Slider is compatible with the Universal Case Feeder. Automatic Processing Press (APP) owners: This case feeder is compatible, use the risers that ship with your APP. Automatic Case Prrimer (ACP) ownders: This case feeder is compatible, use the risers that ship with your ACP. It works with 30 Luger, 30 Mauser, 7.