The Modular Headspace Comparator Inserts are designed for precision cartridge headspace and bullet measurements, and require the separate purchase of the Modular Headspace Comparator Body.
The new Modular Headspace Comparator is made from 17-4 Stainless Steel for enhanced durability and corrosion resistance, and can accommodate cartridges up to 338 Lapua Magnum.
These inserts are produced by SHORT ACTION CUSTOMS, LLC, specifically for the 300 Norma cartridge and are part of the Case Gauges & Headspace Tools category.