41 Mag Shell Plate #9 for Lee Auto Breech Lock Pro by Lee Precision Product Overview now offers the Lee 41 Mag Shell Plate #9 for Lee Auto Breech Lock Pro. The BL Pro Shell Plate is for use on the Lee Breech Lock Pro press for progressive reloading. The #9 Shell Plate is constructed of high quality materials for strength and durability. These shell Plates are precision ground to prevent cases snagging or rough edges that impede loading. The #9 Shell Plate is sized for 41 Mag. Specifications and Features High Quality Materials 41 Mag Precision Ground For Use in Breech Lock Pro