The RCBS Case Master Gauging Tool (brand part no. 87310) is built for reloaders chasing the tightest possible accuracy from handloaded ammunition. It measures case neck concentricity, neck wall thickness uniformity, and bullet runout in one tool, so a handloader can verify that every piece of brass on the bench is actually consistent rather than just assuming it. It also doubles as a quality check on the rest of the reloading setup, since it can catch case-head separation starting on the inside of a case well before it becomes visible from the outside.

Key Specifications

• Neck Concentricity Measurement checks how evenly centered the case neck is on the case body
• Neck Wall Thickness Uniformity measurement flags brass with uneven neck walls before it causes inconsistent bullet tension
• Bullet Runout Measurement verifies how straight a seated bullet actually sits in the case neck
• Case-Head Separation Detection can catch internal case-head separation before it becomes visible from the outside

Frequently Asked Questions

What does this tool measure? Case neck concentricity, neck wall thickness uniformity, and bullet runout, all in one gauging tool.

Can it detect brass that’s about to fail? Yes, it can detect case-head separation starting on the inside of a case before it’s visible from the outside.

Buy the RCBS Case Master Gauging Tool

For handloaders who want to verify brass consistency rather than assume it, the Case Master turns bench-level quality control into a repeatable check. Order from RCBS‘s case preparation lineup. Ships fast from a Lubbock, TX gun shop.