Concentricity-Wall Thickness & Run-out Gauge

Concentricity, Wall-Thickness & Runout Gauges

Ammunition that runs true to the bore tends to shoot more consistently. The gauges in this category let handloaders measure and sort cases and loaded rounds for quality.

The NECO Concentricity, Wall-Thickness and Runout Gauge measures case-neck wall-thickness variation and the runout of loaded cartridges, helping you identify cases that seat bullets off-axis. Stainless digital calipers cover everyday length and dimension checks, and the Magnum Case Gauge Companion assists with case-gauging tasks at the bench.

These tools appeal to precision and benchrest reloaders who cull or index brass to reduce group size. For correcting alignment rather than just measuring it, see the related Cartridge Alignment Tool (CAT), and pair careful case prep with the reloading aids and lubricants offered across the site.