RCBS Case Master Gauge Tool

RCBS Case Master Gauging Toll - The key to loading the most accurate ammunition possible is to keep everything as precise as possible. The Case Master Gauging Tool can easily measure neck concentricity, uniformity, thickness, case length and bullet run-out. All of these measurements are important to get reloading equipment setup to produce the most accurate rounds. This tool will also aid in detecting case head separation before any symptoms are apparent on the outside of the case.

Precision Aluminum Base
Provides accurate measurements.

I used one of these to check bullet run out and was able to improve my accuracy. Bullet run is now .001 or less. Also, used it to measure case thickness to determine case life. A must have for the serious reloader.