RCBS Full Length Die Set Features The RCBS Full Length Die Set is built for reloading bottleneck cases in .338 Weatherby RPM consisting of a Full-Length Sizer Die with an integrated Expander-Decapping Unit and a separate Seater Die. The sizer die brings fired cases back down to SAAMI minimum cartridge dimensions sizing the case exterior while simultaneously de-priming and expanding the case neck to properly accept a new bullet. Vents machined into the die allow trapped air and excess lubricant to escape during the sizing stroke preventing the case damage that can occur when air becomes trapped inside. Headspace on the die is held to minimum tolerances helping maintain consistent case body length through repeated firing and resizing cycles. The included Seater Die features a built-in roll crimper letting the reloader crimp the case mouth onto the bullet at the same time it is seated streamlining the reloading process into fewer steps. Both dies use a standard 7/8-14 thread pattern ensuring compatibility with virtually every single stage and turret reloading press on the market. Machined from RCBS s proprietary die steel the set is built to hold tight tolerances over thousands of reloading cycles. Shipped in RCBS s signature green die box for organized storage this Full Length Die Set for .338 Weatherby RPM is available for sale at GrabAGun. RCBS Full Length Die Set Specifications Manufacturer: RCBS Model: Full Length Die Set Caliber: .338 WBY RPM Die Type: Full Length Sizing / Bullet Seating Number of Dies in Set: 2 Thread Pattern: 7/8-14 Material: Proprietary Die Steel Packaging: Green Die Box Available At: GrabAGun