The Hornady 041203 Small Primer Pocket Reamer is engineered to cut away the staked or ring crimps commonly found on military-surplus cartridge cases, such as 5.56×45mm NATO, .223 Remington, and 9×19mm NATO brass. Removing these factory crimps allows new Small Rifle (SR) or Small Pistol (SP) primers to be seated smoothly without distortion, crushing, or misalignment. Built with a hardened tool steel cutter head, the tool can be operated as a standalone manual handheld unit using the included contoured handle, or unthreaded to interface directly with powered prep centers and motorized drill adapters.

Key Features

• Military Crimp Cutting: Precision-ground cutter head removes staked and circular military primer pocket crimps without cutting into the pocket floor.
• Modular 8-32 Threading: Features an industry-standard 8-32 male thread on the cutter head, allowing seamless transfer between the manual handle, the Hornady Case Prep Trio, the Hornady Power Case Prep Center, or standard 1/4-inch hex adapters.
• Durable Construction: Hardened tool steel reamer head resists edge wear during high-volume brass processing.
• Ergonomic Manual Handle: Textured, contoured handle provides precise control when chamfering crimped pockets by hand at the reloading bench.

Specifications

• Manufacturer Part Number (MPN): 041203 / 41203
• Pocket Size Compatibility: Small Primer Pockets (Small Rifle, Small Pistol)
• Thread Interface: Industry-standard 8-32 male thread
• Packaged Weight: 0.15 lbs (approx. 68 g)
• Tool Weight: 45–60 g
• Material: Hardened tool steel cutter head with contoured handle
• Operation Mode: Manual hand tool or motorized via 8-32 female powered stations

Who is the Hornady Small Primer Pocket Reamer for?

• Handloaders processing military-surplus 5.56x45mm NATO or .223 Remington brass — provides a dedicated cutter head sized specifically for Small Primer Pockets, eliminating staked or ring crimps so new primers can be seated without resistance.
• Reloaders utilizing 8-32 threaded manual or powered case preparation equipment for small primer calibres — utilizes an industry-standard 8-32 male thread with a compact 0.15 lbs packaged weight, allowing the small primer pocket reamer head to detach from its handle and mount directly to motorized case prep stations.

Less suitable for: Reloaders working with Large Rifle or Large Pistol calibres (such as 7.62×51mm NATO or .308 Winchester), which exceed the diameter threshold of this tool and require a dedicated large primer pocket reamer.