Sinclair - Comparator Insert Barrel Off The Lock-N-Load Headspace Comparator extends

The Lock-N-Load Headspace Comparator extends brass life

Major seating adjustments can be made with the 3/8″ – 24 TPI threads in the cap

7 X 28FN to the largest Magnums

Don't forget to order a collet and a pilot

Sinclair - Comparator Insert Barrel Off The Lock-N-Load Headspace Comparator extendsThe 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