Auto Prime for Magnum cases

The Original Auto Prime (round trays) body has to be opened up slightly on the top rim for large diameter Magnum cases to fit. This generally applies to the larger belted magnums. It is easy to see where the bind occurs.

The New Auto-Prime can accept the magnum cases out of the box.

This can be done with a Dremel Moto-tool, or something similar. If you are unable to perform this modification at home, you can return the tool to the factory and we will modify it for a $10.00 charge. 

Lee Precision, Inc.
4275 Hwy. U, 
Hartford, WI 53027