The Stoney Point Chamber-All Bullet Comparatorbody attaches to the blade of your caliperwith a small thumbscrew and utilizesinserts for each caliber. The design of thistool allows proper alignment when usedwith the Stoney Point Chamber-All OALgauge (offset position), or it can be used ina conventional centerline method. Inserts aresold separately, or the tool can be purchaedwith six inserts as a kit. The body can also be usedwith to hold the Stoney Point headspace gage inserts.
Big Book Catalog, Issue:67, Page:514
Sinclair, Issue:4B, Page:028