The RCBS MatchMaster Competition Seater Die (.308 Winchester, MPN: R15540) is a premium-tier, non-carbide steel reloading tool engineered specifically for precision handloading. It allows users to seat bullets into .308 Winchester cartridge cases with highly accurate, repeatable depth adjustments. Operating as a fully manual mechanical tool, it requires no electrical power, making it fully compatible with any Australian reloading bench setup.

Key Features

• Bullet Loading Window with Retention: Features a dedicated cut-out window in the side of the die body to drop the bullet directly into the opening, utilizing an internal sleeve to catch, hold, and coaxially align the bullet with the case mouth.
• Micrometer Adjustment Dial: Equipped with an oversized, high-visibility micrometer dial that allows handloaders to adjust seating depth in precise 0.001-inch increments.
• Free-Floating, Self-Centering Seating Stem: Employs an inner sleeve that guides the cartridge case and self-aligns the bullet coaxially to minimize runout and maximize round concentricity.
• Standard Threading: Uses a standard 7/8"-14 thread interface for universal compatibility with standard single-stage and progressive reloading presses.

Product Specifications

• Calibre Compatibility: .308 Winchester
• Thread Interface: 7/8"-14 thread
• Adjustment Increments: 0.001 inch
• Product Weight: 0.91 lbs (0.41 kg)
• Shipping Weight: 0.95 lbs (0.43 kg)
• Shipping Dimensions: 152mm (L) x 114mm (W) x 51mm (H)
• Included Components: Single seating die and a plastic storage box (shellholder not included)

Who is the RCBS MatchMaster Competition Seater Die for?

• Competitive target shooters — require extreme precision when preparing match ammunition, which is achieved through the RCBS MatchMaster Competition Seater Die and its ability to dial in seating depths in precise 0.001-inch increments to control cartridge overall length.
• Long-range precision marksmen — seek to minimize runout and achieve sub-MOA groupings by using this RCBS MatchMaster Competition Seater Die, which features a free-floating, self-centering seating stem and standard 7/8"-14 threading to fit their existing precision benchtop reloading presses.

Less suitable for: Reloaders seeking to process cartridges other than the .308 Winchester calibre, or those utilizing heavy-duty reloading presses that natively require oversized 1-1/4" threads without a reducing bushing; these setups require calibre-specific dies or wider-threaded alternatives.