RCBS 90379 Primer Pocket Uniformer Small Multi-Caliber Tool

The RCBS 90379 Primer Pocket Uniformer eliminates inconsistent primer seating by cutting primer pockets to uniform depth and diameter. This precision reloading tool ensures consistent ignition across multiple small rifle and pistol calibers, improving accuracy and reliability shot after shot.

What Makes This Different

Unlike standard primer pocket cleaners that only remove residue, this uniformer actually cuts material to create perfectly consistent pocket dimensions. The hardened steel cutting head removes variations in pocket depth that occur during case manufacturing, while the adjustable stop collar prevents over-cutting. This level of precision control sets it apart from basic cleaning tools that can't address dimensional inconsistencies.

Key Features

• Hardened steel cutting head creates uniform pocket depth and diameter
• Adjustable stop collar prevents over-cutting and ensures repeatability
• Compatible with small rifle and pistol primer pockets (.175" diameter)
• Works across multiple calibers including .223, .308, 9mm, .45 ACP, and more
• Ergonomic handle provides comfortable grip during extended reloading sessions
• Precision-machined components ensure consistent results batch after batch
• Durable construction withstands thousands of case preparations

Consistent primer pocket dimensions directly impact ignition timing and pressure curves, making this tool essential for precision rifle competition and match-grade ammunition preparation. The uniformer addresses manufacturing tolerances that can vary by several thousandths of an inch between cases, even within the same lot. Weather conditions and temperature changes won't affect the tool's performance, maintaining accuracy whether preparing cases in a heated workshop or at an outdoor range.

Technical Specs

• Cutting head diameter: .175" for small primers
• Handle length: approximately 4 inches
• Material: hardened tool steel cutting head with steel handle
• Compatible calibers: all small rifle and pistol cases
• Stop collar: adjustable depth control
• Weight: approximately 3 ounces
• Country of origin: USA
• Manufacturer: RCBS (Rock Chucker)

Serious reloaders recognize that primer pocket uniformity directly affects accuracy potential. This tool transforms inconsistent factory cases into precision components worthy of match-grade loads, making it an investment that pays dividends in improved group sizes and reduced velocity variations.