The RCBS 260 Rem Neck Sizer Die (SKU: R12830) is a high-precision, mechanical reloading tool engineered to resize only the neck portion of a .260 Remington (6.5mm) cartridge case. Manufactured from hardened proprietary die steel, this die leaves the case body and shoulder untouched. This design allows the brass to retain its fire-formed dimensions, matching the exact shape of a specific rifle chamber for superior concentricity and accuracy. Operating with a standard 7/8"-14 thread pitch, this die is universally compatible with standard single-stage and progressive reloading presses.

Equipped with an integrated Expander-Decapping Unit, this tool performs dual functions in a single press stroke: it de-primes the spent cartridge casing while expanding the neck to the exact dimensions required to securely hold a new bullet. Sizing only the neck avoids work-hardening the cartridge body and shoulder, which extends the overall lifespan of the brass and reduces the risk of case head separation.

Key Features

• Targeted Sizing: Resizes only the neck of the .260 Remington cartridge, leaving the fire-formed case body and shoulder at chamber-matched dimensions.
• Dual-Function Assembly: Includes an integrated Expander-Decapping Unit to de-prime and expand the case neck simultaneously.
• Premium Construction: Crafted from hardened proprietary die steel to ensure long-term durability and consistent sizing dimensions.
• Universal Compatibility: Built with a standard 7/8"-14 thread pitch to fit standard single-stage and progressive reloading presses.
• Micro-Adjustable Threading: Features a thread pitch where one full turn in the press moves the die approximately 0.072 inches (1.82 mm), allowing precision adjustments down to 0.002 inches per 1/10th turn.

Specifications

• Calibre: .260 Remington (6.5mm)
• Thread Interface: Standard 7/8"-14 thread
• Material: Hardened proprietary die steel
• Die Classification: Group A - Popular Rifle Calibers
• Required Shell Holder: RCBS Shell Holder #3 (Part #RC09203) or Shell Plate #3 (Part #RC88803) (sold separately)

Who is the Rcbs 260 Rem Neck Sizer Die for?

• Benchrest competitors — requires a dedicated 260 Remington neck sizer die compatible with an RCBS Shell Holder #3 to process .260 Remington (6.5mm) casings, ensuring the fire-formed body remains perfectly matched to their custom bolt-action chamber for maximum concentricity.
• Precision load developers — extends the usable lifespan of expensive .260 Remington (6.5mm) brass by using a specialized neck sizer die to avoid work-hardening the case body and shoulder, preventing premature case head separation.

Less suitable for: Reloaders preparing ammunition for semi-automatic, pump, or lever-action firearms, or those sharing brass across multiple different rifles of the same calibre. For these applications, a full-length sizing die or small-base sizing die must be used instead to return the entire cartridge body to SAAMI minimum dimensions and guarantee reliable chambering.