The Redding Type S Match Bushing Neck 3-Die Set for .300 Winchester Short Magnum (.300 WSM) is engineered for precision handloaders requiring tight runout control and custom neck tension. Built to fit standard 7/8"-14 threading reloading presses, this mechanical 3-die set allows users to resize fire-formed brass while preserving case geometry. It features a Type S Bushing Neck Sizing Die, a dedicated Body Die, and a Competition Bullet Seating Die with micrometer adjustments graduated in 0.001" increments to ensure precise, repeatable seating depth.

Key Features

• Type S Bushing Neck Sizing Die: Employs interchangeable sizing bushings (sold separately) that self-center on the case neck to minimise brass work-hardening and runout. Includes a decapping rod, standard expander button, and a decapping pin retainer for sizing with or without an expander ball.
• Dedicated Body Die: Restores body dimensions and bumps case shoulders back 0.001" to 0.002" when chambering resistance increases, without contacting or resizing the case neck.
• Competition Seating Die: Features an internal sliding sleeve that aligns both the bullet and the case neck prior to seating, paired with an adjustment top calibrated in precise 0.001" increments.
• Industry-Standard Threading: Machined with 7/8"-14 threads for compatibility with standard single-stage and turret reloading presses.

Specifications

• Product Type: Match grade neck die set (3-Die Set)
• Manufacturer Part Number (MPN): 38223
• Calibre: .300 Winchester Short Magnum (.300 WSM)
• Bullet Diameter Compatibility: .308"
• Thread Standard: 7/8"-14 threading
• Adjustment Increments: 0.001" on Competition Seating Die micrometer
• Packaged Weight: Approximately 0.85 kg to 0.95 kg (1.9 lbs to 2.1 lbs)
• Required Accessories: Redding neck sizing bushings and #6 standard or competition shellholder (sold separately)

Who is the Redding 300 WSM Type S Match Neck Die Set for?

• Long-range precision and F-Class target shooters — Provides a dedicated 3-die set that controls neck tension via interchangeable bushings and includes a Competition Seating Die with 0.001" micrometer increments to eliminate bullet runout on fire-formed .300 WSM brass.
• PRS competitors and benchrest reloaders — Uses universal 7/8"-14 threading to integrate into standard reloading presses, allowing users to isolate shoulder bump using the dedicated Body Die while tuning bullet jump in 0.001" increments.

Less suitable for: Reloaders feeding semi-automatic actions or high-stress hunting rifles requiring 100% guaranteed chambering clearance on unfired or mixed brass; a full-length sizing die set is better suited for non-bolt-action or dangerous game applications.