This instument provides an extremely fast and accurate methond for comparing the shoulder position of fired and/or sized cases and bullet seating depth uniformity.

Quickly perform any of the following tasks:

Check uniformity of shoulder bump

Check bullet seating depth uniformity

Compare sized cases to fired cases to determine the amount of headspace

Sort cases fired in two or more rifles

Sort sized cases for uniformity

Set up sizing die correctly

Check trim length for uniformity

Sort bullets for uniformity