The RCBS case master concentricity gauging tool is designed to help reloaders create the most accurate ammunition possible.

This tool easily measures neck concentricity, uniformity, thickness and bullet run-out to ensure that all reloading equipment is set-up to produce the most accurate rounds possible. This tool can also be used to detect case head separation before any symptoms are apparent on the outside of the case.

Technical Information

• Material: Aluminium base with steel accessories
• Accuracy: 0.001"

Features:

• Fully adjustable V-blocks to securely position the case for an accurate measure
• Compact base for convenience but still steady enough for the tasks at hand