The Redding 223 Rem Small-Base Full Length Sizing Die (MPN 08111) is engineered to resize fired .223 Remington and 5.56×45mm NATO brass to minimum SAAMI specifications or slightly below standard tolerances. Designed specifically to reduce the case body diameter by an extra 0.001" to 0.002" compared to standard full-length dies, it ensures flawless feeding, chambering, and extraction in tight match chambers and fast-cycling actions. Machined from high-grade alloy steel on precision lathes, heat-treated in atmospherically controlled furnaces, and hand-polished, this die includes an integrated decapping rod assembly and an internal neck expander ball to prepare fired brass for consistent reloading.

Key Features

• Small-Base Sizing Geometry: Reduces case body diameter an additional 0.001" to 0.002" and sets the shoulder back to guarantee chamber lockup in tight tolerances.
• Precision Construction: Manufactured from alloy steel, heat-treated in controlled furnaces, hand-polished, and ultrasonically cleaned.
• Internal Assembly: Fitted with an integrated decapping rod and internal neck expander ball (sizing button) for complete one-pass decap and sizing operations.
• Standard Press Interface: Uses industry-standard 7/8"-14 threading to fit single-stage, turret, and progressive reloading presses.
• Action Reliability: Sized to eliminate chambering resistance caused by brass previously fired in generous or military-spec chambers.

Product Specifications

• Calibre: .223 Remington (compatible with 5.56×45mm NATO brass)
• Die Type: Small-base full-length sizing die
• Thread Pitch: 7/8"-14
• Material: Heat-treated alloy steel
• Package Dimensions: 12.7 × 7.6 × 3.8 cm (5.00 × 3.00 × 1.50 in)
• Weight: Approximately 0.45 kg (1.00 lb)
• Required Accessories: Standard .223 Rem shellholder (Redding #10) and high-pressure sizing lubricant (sold separately)

Who is the Redding 223 Rem Small-Base Full Length Sizing Die for?

• AR-15 and Semi-Automatic Rifle Reloaders — Requires small-base sizing to reduce .223 Remington case body diameters an extra 0.001" to 0.002" for 100% reliable feeding and extraction in semi-automatic actions that lack manual bolt camming leverage, threaded to standard 7/8"-14 presses.
• Competitive Shooters and Pest Controllers — Needs this small base reloading die to restore mixed or range-fired .223 Remington brass back under minimum SAAMI tolerances, ensuring effortless bolt closure in tight, minimum-spec match chambers and fast-cycling straight-pull or pump actions.

Less suitable for: Dedicated single-rifle bolt actions with standard chambers, where standard full-length sizing dies or neck-sizing dies are preferred to minimise brass work-hardening and extend overall case life.