The Redding Competition Seating Die for .223 Remington with Micrometer (MPN: 55111) is a precision handloading tool designed to seat .224" diameter projectiles into .223 Remington bottleneck cases with match-grade concentricity. Featuring a patented internal sliding chamber sleeve, the die fully captures and aligns both the cartridge case and bullet coaxially before seating begins, eliminating bullet tilt and minimising case runout. The top-mounted micrometer provides continuous, click-free depth adjustment with zero-reset capability, mounting directly to standard reloading presses via industry-standard 7/8"-14 threads.

Key Features

• Straight-Line Sleeve Alignment: Internal precision-ground sliding chamber sleeve supports the entire cartridge case and projectile in coaxial alignment prior to seating to reduce bullet runout.
• Micrometer Depth Adjustment: Calibrated micrometer head adjusts bullet seating depth in 0.001-inch (0.0254 mm) increments and allows re-zeroing to specific bullet profiles or chamber dimensions.
• Standard Press Interface: Built with external 7/8"-14 mounting threads to fit standard single-stage and turret reloading presses.
• Interchangeable Seating Stem: Includes a standard profile seating stem (Part #55042) for traditional tangent and secant ogive bullets, with an optional VLD stem (Part #55742) available separately for very low drag profiles.
• Dedicated Seating Operation: Engineered purely for bullet seating without applying a roll or taper crimp, preserving precise neck tension.

Product Specifications

• Manufacturer Part Number (MPN): 55111
• Calibre: .223 Remington
• Compatible Bullet Diameter: .224 inches
• Thread Size: Standard 7/8"-14
• Adjustment Increments: 0.001 inches (0.0254 mm)
• Operation Type: Manual/mechanical
• Shellholder Compatibility: Redding #10 or Redding Competition Shellholder Set #11610 (sold separately)
• Crimp Capability: Non-crimping

Who is the Redding Competition Seating Die for .223 Remington with Micrometer for?

• Precision rifle target shooters reloading .223 Remington for Benchrest and F-Class — Requiring repeatable bullet seating adjustments calibrated in 0.001-inch (0.0254 mm) increments to fine-tune jump to the rifle lands on .224" diameter match projectiles using this competition seating die.
• Varmint hunters developing match-grade handloads for .223 Remington rifles — Requiring a 7/8"-14 threaded straight-line competition seating die to eliminate bullet runout across high-volume .223 Remington cartridge batches.

Less suitable for: Handloaders assembling compressed powder charges, as the floating sleeve and micrometer mechanism are not designed for heavy upward powder compression; standard non-micrometer seating dies or standard hunting seating dies are required for compressed loads.