The Hornady Primer Pocket Reamer Package (Hornady item 041210) is a specialised metallic cartridge reloading tool designed to cut away circular or staked military crimps from spent primer pockets. By removing this crimped material from once-fired military surplus brass, it allows standard commercial primers to be seated smoothly to uniform depths. The tool uses hardened tool steel cutter heads equipped with integrated shoulder stops to prevent over-reaming, paired with a knurled aluminium handle for controlled manual operation.

Key Features

• Military Crimp Removal: Cuts away crimps on military brass such as 5.56x45mm NATO and 7.62x51mm NATO to enable proper commercial primer seating.
• Dual Operation Modes: Operates as a handheld tool using the included knurled handle or mounts directly to motorized case prep centres via standard threads.
• Controlled Cutting Depth: Features built-in shoulder stops on the cutter heads to eliminate the risk of cutting the primer pocket deeper than standard commercial dimensions.
• Multi-Calibre Versatility: Ships with dedicated cutter heads to service both Small and Large centre-fire primer pockets.

Product Specifications

• Manufacturer Item Number: 041210
• Interface Threading: Industry-standard 8-32 thread pitch
• Small Reamer Head: Hornady Part #390750 (Small Rifle / Small Pistol)
• Large Reamer Head: Hornady Part #390751 (Large Rifle / Large Pistol)
• Handle Material: Knurled lightweight aluminium
• Cutter Material: Hardened tool steel
• Operating Method: Manual unpowered hand tool, or machine-driven via 8-32 threaded adapters
• Product Weight: Under 0.15 kg total packaged weight
• Power Requirements: None (purely mechanical hand tool)

Who is the Hornady Primer Pocket Reamer Package for?

• Reloaders processing once-fired military surplus brass — Requires removing circular or staked crimps on calibres like 5.56x45mm NATO or 7.62x51mm NATO, utilising either the Small or Large primer pocket reamer head with industry-standard 8-32 thread pitch to seat commercial primers flush.
• Handloaders managing low-to-moderate batch sizes — Prepares case batches under 50 to 100 cases using this manual primer pocket reamer, with the flexibility to transfer the 8-32 thread pitch cutter heads directly onto motorized prep stations if higher throughput is required.

Less suitable for: High-volume processing runs exceeding 100 cases where manual hand fatigue occurs, or non-standard ammunition types such as .50 BMG and Berdan-primed brass; these workflows are better suited to motorized power case prep centres, single-stage press-mounted swaging tools, or dedicated .50-calibre prep accessories.