Forster Datum Dial Ammunition Measurement System Dial #1

The Forster Datum Dial Ammunition Measurement System gives you the data you need to refine your case sizing operations. The Datum Dial provides a relative measurement between the base of a case to a datum point on its shoulder angle. It may be used before sizing operations to find the optimal headspace for your firearm. After sizing operations, use the Datum Dial to check the setup and consistency of your reloading process. When used in conjunction with the Datum Dial (DD1010) the tool measures