Expanding Mandrel Precision Expanding Die

The Precision Expanding Die offers the handloader unparalleled control over the I.D. of their case necks (neck tension). Precision Expanding Dies are machined on CNC Lathes and heat-treated to ensure dimensional integrity and durability for a lifetime of use. The unique angled alignment surfaces of the Die Body and Mandrel ensure perfect alignment when assembled and secured with the threaded retention plug and lock ring.