QUEEN Reloading Comparator Bump Insert 23 222/223 QR059

These headspace gauge inserts are designed to ensure quick and precise measurement of cartridge headspace. Made to measure the cartridge shoulder during Full Length die setup. We normally recommend a reduction between .001” and .002” for fired and resized cases in bolt-action rifles, and between .003” and .005” for semi-automatic firearms. Proper shoulder resizing is crucial for ammunition accuracy as it chambers with the same pressure every time without causing imbalances. These inserts require the dedicated Body (sold separately) to be used. Made of steel to prevent wear and resist acids.

308 FAMILY
20°

223 FAMILY
23°

PPC, BR & 6.5X47 FAMILY
30°

284 & WSM FAMILY
35°