The RCBS Small Multi-Caliber Primer Pocket Uniformer (RCBS part no. 90379) trues up the primer pocket on multi-caliber brass so every primer seats to a consistent depth and makes even contact with the anvil. Reloaders chasing better ignition consistency use tools like this during case prep, after cases have been resized and before priming, to remove crimping residue and machining variance left in the pocket from the factory. It’s a small hand tool, but a real accuracy step for anyone loading precision or match ammunition.

Key Specifications

• Carbide cutter, holds an edge far longer than steel when uniforming large batches of brass.
• Trues both the pocket wall and bottom, so the primer seats flush and square instead of tilted or high.
• Sized for multi-caliber brass, matching the primer pocket dimensions of that case class.
• Tool measures about 2.05 inches, sized for comfortable hand use at the reloading bench.
• Weighs about 0.8 oz, light enough to keep in a case-prep kit without adding bulk.

Frequently Asked Questions

What does a primer pocket uniformer do? It cuts the primer pocket wall and bottom to a consistent depth and squareness so every primer seats the same way.

Is this for rifle or pistol brass? This is the small multi-caliber version, sized for multi-caliber cases.

Buy the RCBS Small Multi-Caliber Primer Pocket Uniformer

Add this uniformer to your case prep routine for more consistent primer seating and ignition. Order it from our Lubbock, Texas gun shop along with the rest of the case preparation lineup from RCBS.