The RCBS .204 Ruger Neck Die Set (Model R10302) is a specialized two-die reloading system engineered specifically for bottleneck cartridge cases. By processing only the neck of the case, this manual tool resizes brass without altering the body or shoulder dimensions, retaining the precise fire-formed shape of your rifle's chamber. This mechanical tool is fully compatible with standard Australian reloading benches and operates without electrical power.

Key Features

• Neck-Sizing Only: The Neck Sizer Die resizes only the neck of the cartridge, leaving the case body and shoulder untouched to minimize cold-working of the brass and prevent early case head separation.
• Enhanced Precision: Keeping the fire-formed chamber shape of the casing reduces cartridge concentricity errors and improves shot-to-shot consistency.
• Complete Two-Die Set: Includes a Neck Sizer Die with an Expander-Decapping Unit and a Seater Die with a Bullet Seater Plug and an integrated roll crimper.
• Standardized Threading: Built with industry-standard threads to fit seamlessly into standard reloading presses.

Product Specifications

• Model/SKU: R10302 (also referenced as 10302)
• Calibre Compatibility: .204 Ruger
• Thread Interface: 7/8"-14 thread
• Required Shell Holder: RCBS Shell Holder #10 (sold separately)
• Components Included: Neck Sizer Die (with Expander-Decapping Unit), Bullet Seater Die (with Roll Crimper)

Who is the Rcbs 204 Ruger Neck Die Set for?

• Target shooters and varminters — who require maximum brass longevity and shot-to-shot consistency for their .204 Ruger caliber rifles by utilizing a neck sizing die set that mounts to standard reloading presses via a 7/8"-14 thread interface.
• Bolt-action precision handloaders — who want to produce custom-fit ammunition for a single rifle chamber, using this specialized neck sizing die set to process bottleneck .204 Ruger brass without over-working the metal.

Less suitable for: Owners of semi-automatic, pump-action, or lever-action rifles, where neck-sized ammunition can cause feeding and chambering failures; these shooters require a full-length sizing die set or small base die set to restore brass to SAAMI minimum dimensions.