0.311"

30 Caliber 0.311″ Proj. Pilot Set Rental This 30 caliber 0.311″ Proj. pilot set of six is designed for use with chamber reamers to ensure proper alignment and consistent, accurate chamber cutting on .30 caliber rifle barrels for a 0.311″ diameter projectile. Precision-ground pilots, ranging from 0.3005″ to 0.3030″, help maintain concentricity between the reamer…