6.8 SPC and 224 Valkyrie Shell Plate #21 for Lee Auto Breech Lock Pro by Lee Precision Product Overview now offers the Lee 6.8 SPC and 224 Valkyrie Shell Plate #21 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 #21 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 #21 Shell Plate is sized for 6.8 SPC and 224 Valkyrie. Specifications and Features High Quality Materials 6.8 SPC and 224 Valkyrie Precision Ground For Use in Breech Lock Pro