Hornady Neck Wall Thickness Gauge

Hornady Neck Wall Thickness Gauge

The Neck Wall Thickness Gauge is a good addition to the Concentricity Tool from Hornady, with the Neck Wall Thickenes Gauge you can determine the thickness of the material of your case mouth to within 0.0005 inch accuracy.

New and certainly used cases that are custom made can vary in thickness of the case mouth, when firing the cartridge the case expands in the chamber, if there is a lot of variation in the size of the case mouth, this can affect the bullet flight. With the help of this tool you can measure what this thickness of the material at the case mouth is and eliminate deviating cases.

This way you sort the best cases with as little deviation as possible for the best result.