Sinclair - Comparator Insert Size:22 cal These screws are precision made

These screws are precision made and hardened for repeated trial fittings

Micrometer allows fine-tuning in either direction

21st Century Barrel Off bore guides are long enough to extend well past the end of your scope

Dries instantly

Sinclair - Comparator Insert Size:22 cal These screws are precision madeThe Sinclair Bullet Comparator inserts are meant to be used with the Sinclair Bullet Comparator and Bump Gage Body. These inserts are stainless steel and machined with a taper and a short straight section to more accurately duplicate the chamber throat. This eliminates the wobble experienced with many comparators which have standard drilled holes. Our design allows you to quickly and accurately measure and compare bullet ogive to base as well as