Easy-to-use ammo measurement system gives you the data youneed to refine your case sizing operations. Includes one Datum Dial tool forchecking cartridge cases, chart showing common datum diameters, instructionsand storage box. (A caliper is required.)
Provides a relative measurement between the base of a caseto a datum point on its shoulder angle. May be used:
Cartridges available separately. Also sold is the DatumDial Kit with Cartridge Dials #1 and #2 included.
Features