The Sinclair Bullet Comparator Inserts are designed to fit the Sinclair Comparator and Bump Gage Body for precise bullet and cartridge measurements.
Constructed from stainless steel with a tapered design, these inserts minimize wobble and more accurately replicate the chamber throat.
They allow for consistent measurement of bullet ogive-to-base and loaded round ogive-to-cartridge-base, offering more reliability than overall length measurements.