Imagine being able to easily and precisely being able to seat bullets from a 22 Creedmoor, 6 BR, 6.5 Creedmoor and 308 Winchester all with the same die. Or a 6.5 SAUM, 28 Nosler, and a 300 RUM with the same die. "The" Seating Die will be your one stop shop for a family of cartridges. Here is a list of Cartridges compatible with each type of "THE" Seating Die: Type 1 - 223 Remington Family with 0.373" Body Diameter Type 2 - Valkyrie and SPC Family with 0.424 Body Diameter Type 3 - ARC, Grendel and PPC Family with 0.444" Body Diameter Type 4 - Short Action 308 Winchester Family with 0.480" Body Mfg: Short Action Customs, Llc.