Hornady Cartridge Headspace Gauge Bushing 400 Diameter

The Hornady Lock-N-Load Headspace Gauge is perfect for measuring from the case-head to the datum line on the case shoulder to allow proper brass resizing for a precise fit with the rifle chamber. Bushings fit the comparator body and attach to calipers with a thumb screw. Can be used with bottleneck cases from 17 caliber through large belted magnums. This is for the bushing only, the Bullet Comparator and Calipers that are required for the set to work are Sold Separately. All bushings are interchangeable with the Comparator