The Whidden Gunworks shoulder bump gauge enables you to adjust your sizing die to the desired measurement. The bump gauge is attached to your calipers with a set screw and determines the measurement from the base to the shoulder of the case.

Compatible Calibers:

6.5 Creedmoor, 6 Creedmoor, .243 Win, 6.5 RDAUM, 6 SLR, 6.5 SLR, .260 Rem, .280AI, .308 Win.. .300 RSAUM