The RCBS Case Master Concentricity Gaging Tool (RCBS part no. 87310) lets precision handloaders check runout on both unloaded cases and finished, loaded ammunition, with the added ability to correct excessive runout on the spot rather than just identifying it. Runout, or misalignment between the bullet and case axis, can push accuracy off target the instant a round leaves the muzzle, and RCBS built this tool to give reloaders a direct way to measure and address it at the bench instead of guessing why a batch of ammunition is not grouping as expected.

Key Specifications

• Measures runout on both cases and fully loaded rounds.
• Includes the ability to correct excessive runout, not just measure it.

Frequently Asked Questions

What does this tool measure? It measures runout, meaning how far a bullet or case is misaligned from true center.

Can this tool fix runout, or only measure it? It is built to both measure and correct excessive runout on loaded ammunition.

Buy the RCBS Case Master Concentricity Gaging Tool

Order yours from RCBS in our reloading equipment lineup and check every batch for runout before it leaves the bench. Order it from our Lubbock, Texas gun shop for fast, insured shipping.