RCBS Expander/Decapping Unit – .223 Remington / 5.56mm The RCBS Decapping Unit for .223 Remington / 5.56mm is a factory replacement assembly designed to restore full function to your RCBS sizing die. It combines the expander rod, expander ball, and decapping pin into one precision-machined unit, ensuring consistent neck tension and reliable primer removal. Key Features: All-in-One Assembly: Includes expander rod, expander ball, and decapping pin Precision Machined: Maintains concentricity and smooth case neck expansion Durable Steel Construction: Built for long-term reliability Factory Replacement: Same unit shipped with RCBS .223/5.56mm sizing dies Compatible Calibers: .223 Remington, 5.56 NATO, .222 Rem, .22-250, .22 Hornet, and more Specifications: Feature Details Caliber .223 Remington / 5.56mm Components Expander rod, ball, decapping pin Material Hardened steel Item Number 9802 Compatibility RCBS bottleneck sizing dies Performance and Application This unit is essential for reloaders who want to maintain consistent neck tension and primer pocket cleanliness. It’s especially useful for high-volume shooters or those who want a spare on hand in case of pin breakage.

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RCBS Expander/Decapping Unit – .30 Caliber / 7.62mm The RCBS .30 Caliber Expander/Decapping Unit is a factory replacement assembly designed for neck expansion and primer removal in bottleneck rifle cartridges. It’s compatible with a wide range of .30-caliber cases, including .308 Win, .30-06 Springfield, .300 Win Mag, and more. Key Features: All-in-One Assembly: Includes expander rod, expander ball, and decapping pin Precision Machined: Ensures concentricity and smooth case neck expansion Durable Steel Construction: Built for long-term reliability Factory Replacement: Same unit shipped with RCBS sizing dies Wide Compatibility: Works with .30 Rem, .30-30 Win, .308 Win, .300 BLK, .300 Win Mag, .300 Wby Mag, .30-378 Wby Mag, and others Specifications: Feature Details Caliber .30 / 7.62mm Components Expander rod, ball, decapping pin Material Hardened steel Item Number 9812 Compatibility RCBS bottleneck sizing dies Performance and Application This unit is essential for maintaining neck tension and primer pocket cleanliness during resizing. It’s especially useful for reloaders who want a spare on hand or need to replace a worn or damaged unit.

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RCBS Guide Bushing – 6.5 Caliber, Large Diameter The RCBS Guide Bushing for 6.5mm calibers (Large Diameter) is a precision-machined steel insert designed to control neck tension during resizing. Used with RCBS MatchMaster and Gold Medal Bushing Dies, it allows reloaders to fine-tune bullet grip and reduce case neck work—resulting in improved accuracy and extended brass life. Key Features: Caliber-Specific Fit: Designed for .264" bullets (6.5mm), including 6.5 Creedmoor, 6.5x55 Swede, and 6.5 PRC Large Diameter Option: Accommodates thicker neck walls or custom brass with minimal neck tension Self-Centering Design: Ensures concentric alignment with the case neck Hardened Steel Construction: Built for long-term precision and durability Interchangeable System: Works with RCBS MatchMaster and Gold Medal neck bushing dies Specifications: Feature Details Caliber 6.5mm (.264") Diameter Range Typically .286"–.295" (varies by brass) Material Hardened steel Compatibility RCBS MatchMaster & Gold Medal dies Item Number Varies by bushing size Choosing the Right Size: To determine the correct bushing diameter: Method 1: Measure the outside neck diameter of a loaded round and subtract .002"–.003" Method 2: Measure neck wall thickness × 2, add bullet diameter, then subtract .001" Example: (.015" × 2) + .264" – .001" = .293" bushing RCBS recommends keeping one size above and below your target for tuning neck tension. Performance and Application This bushing is essential for precision reloaders who want to control neck tension and reduce brass fatigue. It’s especially effective for long-range and competition shooters using high-end brass with consistent neck thickness.

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RCBS Lock Nut – 1/4"-28 Thread The RCBS 1/4"-28 Lock Nut is a factory replacement part designed to secure decapping rods or expander assemblies in RCBS resizing dies. Precision-machined and threaded to 1/4"-28 TPI, it ensures a tight, vibration-resistant hold—essential for maintaining consistent die setup during reloading. Key Features: 1/4"-28 Thread Size: Standard fine-thread fit for RCBS decapping rods Factory Replacement: Same lock nut included with RCBS resizing dies Hardened Steel Construction: Built for durability and repeat use Hex Profile: Allows easy tightening with a wrench or nut driver Prevents Backing Out: Keeps internal die components securely in place Specifications: Feature Details Thread Size 1/4"-28 Material Hardened steel Use Secures decapping/expander rods Compatibility RCBS resizing dies Item Number 193949 Performance and Application This lock nut is essential for maintaining die alignment and preventing component shift during high-volume resizing. It’s especially useful for reloaders who frequently adjust or replace expander rods and want to ensure a secure, repeatable setup.

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