The Hornady Cartridge Headspace Gauge is designed to measure variations in brass cases before and after firing or resizing. It allows users to compare fire-formed brass against resized brass to ensure proper headspace, which minimizes case stretching, reduces work hardening, extends case life, and improves accuracy. The gauge features five interchangeable bushings that attach to a B-2000 body, compatible with calipers, to measure various bottleneck cases from .17 Remington through belted magnums.
The manual provides instructions on how to install the brass thumbscrew and select the correct bushing for specific cartridge sizes. It details the procedure for measuring cases from the case head to the datum line on the case shoulder. Additionally, the guide explains how to use the gauge to identify cases with bent rims in autoloaders and notes that Ackley Improved chambers use the same bushing size as the parent case.
| Product Name | Cartridge Headspace Gauge |
|---|---|
| Body Type | B-2000 body |
| Number of Bushings | Five interchangeable bushings |
| Recommended Shoulder Adjustment | .001" to .002" |
It measures variations in brass cases before and after firing or resizing to ensure proper headspace, minimize case stretching, and improve accuracy.
The set includes five interchangeable bushings that can check most bottleneck cases from .17 Remington through belted magnums.
The die should be adjusted to set the shoulder back .001" to .002" to provide a proper minimal clearance with the firearm's chamber.
Yes, for shooters with an autoloader, the gauge allows checking fired cases by rotating the brass to identify cases with bent rims.