The Sinclair Bullet Comparator Inserts are designed to be used with the Sinclair Comparator and Bump Gage Body for precise bullet measurement.
These inserts are made of stainless steel with a tapered and straight section to accurately replicate the chamber throat, reducing wobble.
They allow for consistent measurement of bullet ogive-to-base and loaded round ogive-to-cartridge-base, offering more reliability than overall length measurements.