Ultimate Accuracy Enhancement: Maximize your reloading accuracy with the AltitudeCraft headspace comparator kit, which includes 6 bushings to boost brass longevity, enhance accuracy, and ensure safety by precisely measuring brass variations before and after firing or resizing, optimizing each round for unmatched precision. Broad Caliber Compatibility: The AltitudeCraft headspace comparator reloading kit features a comparator body and 6 bottlenecks cases ranging from .17 Rem to belted magnums. An F.188" bushing also enables users to customize bushings for a broader range of bullet calibers. Whether you're reloading for standard cartridges or venturing into custom calibers, our reloading equipment meets all your requirements. Durable and Reliable Design: The reloading kit’s comparator body boasts the dual-screws design, enable seamless connection to your caliper blade, eliminating the need for a third hand to obtain accurate measurements. bushings are color-coded and feature a ceramic-like hard anodic finish for enhanced durability, simplifying identification and increasing longevity. Maximized Brass Lifespan: The headspace gauge kit is ingeniously designed to minimize brass work-hardening and stretching, significantly extending the lifespan of your brass casings. What's Included in the Comparator Kit: The bullet comparator measuring tool includes a comparator body, 6 bushings for sizes A.330, B.350, C.375, D.400, E.420, and F.188, along with an allen wrench and a setscrew. Designed with the utmost safety in mind, the headspace comparator holder kit features precision tools for accurately detecting and adjusting headspace.