RCBS 28401 Full-Length Die Set for .338 WBY RPM Bottleneck Rifle Cartridges

The RCBS 28401 Full-Length Die Set provides the essential tooling for reloading .338 WBY RPM bottleneck rifle cartridges. This two-die set includes a Full-Length Sizer Die with an Expander-Decapping Unit and a Seater Die with a Bullet Seater Plug. Designed for reliable case preparation and consistent bullet seating, the set is suited for reloaders who require precise control over the sizing and seating process.
The Full-Length Sizer Die returns bottleneck cases to SAAMI minimum cartridge dimensions while sizing the outside of the case, removing the spent primer, and expanding the neck to accept a new bullet. Its venting design helps reduce the risk of case damage caused by trapped air or excessive case lubricant. Headspace is maintained within minimum tolerances to help prevent unwanted changes to the case body length during full-length sizing, supporting dependable chambering and repeatable ammunition preparation.
The included Seater Die features an integrated roll crimper that secures the bullet as it is seated. This streamlined design combines bullet seating and crimping in one operation, helping simplify the reloading workflow while promoting consistent cartridge assembly. As part of the RCBS Bottleneck Rifle Cartridges die series, this set is built for reloaders working with .338 WBY RPM ammunition and includes the core dies needed for full-length sizing and bullet seating. Use appropriate reloading procedures, equipment, and published load data when preparing ammunition.

Features:

• Caliber: .338 WBY RPM

• Die Type: Full-Length Sizing and Bullet Seating

• Die Series: Bottleneck Rifle Cartridges

• Set Contents: Two dies

• Full-Length Sizer Die: Sizes the case, removes the spent primer, and expands the neck

• Expander-Decapping Unit: Supports neck preparation and primer removal

• Vented Design: Helps reduce case damage from trapped air and excess lubricant

• Headspace Control: Maintains minimum tolerances during full-length sizing

• Seater Die: Seats bullets and includes an integrated roll crimper

• Brand: RCBS

• Part Number: 28401