The Lock‑N‑Load® Headspace Comparator extends brass life, improves accuracy, and enhances safety. The gauge measures variations in brass before and after firing or re‑sizing. It allows for headspace comparison between fire‑formed brass and re‑sized brass.
The five bushings that come with the Lock‑N‑Load® Headspace Comparator provide the ability to check most bottleneck cases, from .17 Rem through belted magnums. Ackley Improved chambers use the same bushing size as the parent case. See chart provided or consult product instructions for cartridge/bushing size details.
Body with 5 Bushing Set - Comprehensive Bushing Set for All Needs Equipped with five versatile bushings (A330, C375, D400, B350, and E420), this tool set covers a wide range of bottleneck sizes. It provides a complete solution for all your measurement requirements.
