RCBS Full Length Die Set - Group D - Bottleneck Rifle Cartridge .240 Wby

The RCBS Full Length Die Set for Group D Bottleneck Rifle Cartridge .240 Wby is a precision reloading system engineered for shooters who demand tight tolerances and repeatable cartridge dimensions across high-volume ammunition production. This two-die set—comprising a Full-Length Sizer Die with integrated Expander-Decapping Unit and a Seater Die with Bullet Seater Plug—represents the foundational tooling required for consistent .240 Weatherby Magnum ammunition assembly. RCBS Full Length Die Sets are the industry standard for bottleneck rifle reloading, used by competitive shooters, hunters, and ammunition manufacturers who prioritize dimensional consistency and chamber fit.

The Full-Length Sizer Die brings brass to SAAMI minimum cartridge specifications, sizing the case body, neck, and shoulder while simultaneously de-priming spent primers. The die incorporates vented construction to prevent case damage from trapped air pockets and excessive lubricant buildup—critical design features that extend case life across multiple reloading cycles. The Seater Die features precise bullet seating geometry to achieve consistent overall cartridge length (COAL) within the tight tolerances demanded by modern rifle chambers. Headspace is held to minimum tolerances to maintain case body length integrity and prevent dimensional growth that leads to chamber pressure variations.

This die set is intended for reloaders working with .240 Weatherby Magnum brass—whether for long-range precision rifle applications, hunting ammunition tailored to individual firearm specifications, or competitive match rounds. The .240 Wby is a magnum-class bottleneck cartridge demanding precise neck sizing and consistent bullet seating to manage chamber pressures and maximize accuracy potential. Reloaders who have already standardized on RCBS equipment for other cartridges will find this set compatible with standard reloading presses configured for Group D die threading.

RCBS has maintained market leadership in precision reloading dies since the 1950s. The Full Length Die Set architecture—with separate sizer and seater dies rather than combination dies—allows independent adjustment of sizing and seating parameters, enabling fine-tuning that combination die systems cannot provide. This modular approach is favored by precision reloaders who maintain detailed load records and require granular control over cartridge specifications.