The Forster Products Datum Dial Ammunition Measurement System (brand part no. DDKIT) is a dial-indicator comparator that measures case shoulder datum (headspace) and bullet seating depth relative to the lands, giving a handloader a repeatable way to track load consistency from round to round. The complete system includes the dial body and the inserts needed to start measuring, so it’s ready to use out of the box on a reloading bench.

Key Specifications

• Measures case shoulder datum (headspace) for tracking full-length sizing consistency.
• Measures bullet seating depth relative to the case shoulder for load-to-load consistency.
• Includes the dial indicator body and inserts needed to begin measuring immediately.
• Readings are repeatable, letting a reloader spot drift in sizing or seating over a loading session.

Frequently Asked Questions

Do I need inserts to use this? Yes, caliber-specific inserts are required to measure a given cartridge; the body only reads what the insert presents to it.

What does this tool actually measure? It measures case shoulder datum (a headspace reference point) and bullet seating depth relative to the shoulder, both key numbers for consistent handloads.

Is this a go/no-go gauge? No, it’s a comparative measuring tool that gives a numeric readout rather than a simple pass/fail check.

Buy the Forster Products Datum Dial Ammunition Measurement System

Order the Forster Products Datum Dial from our reloading equipment lineup and start tracking headspace and seating depth on every batch you load. Ships fast from a Lubbock, TX gun shop.