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Datum Dial™ Kit

Datum Dial™ Kit


  • Description

    Product Description

    Easy-to-use ammo measurement system gives you the data you need to refine your case sizing operations.

    This complete kit includes one Datum Dial tool for checking cartridge cases, Both bullet/Cartridge dials for use with 17 cal, 204, 224, 243, 257, 264, 277, 284, 308, and 338 bullets, laminated chart showing common datum diameters, instructions and storage box. (A caliper is required.)

    Provides a relative measurement between the base of a case to a datum point on its shoulder angle. May be used:

    • Before sizing operations to find the optimal headspace for your firearm
    • After sizing operations to check the setup and consistency of your reloading process

    Blank Cartridges available separately.


    • Easily interchangeable dials: case and bullet/cartridge dials provide quick measurement of different calibers
    • Consists of only four components: provides the same caliber coverage as other products with many more components
    • Covers multiple calibers: competing products can require the purchase of a separate kit for each caliber needed
    • Measurement is exact variation: no need to subtract body plus bushing/insert length from each measurement
    • Durable plastic storage box: room for extra setup, keeps all components together and protected
  • Additional information

    Additional information

    Weight 0.80000 lbs


  • Resources


    Sales Sheet
    Datum Dial at YouTube.com
    Datum Dial Bullet Measurement  at YouTube.com
    Datum Dial Ammunition System at YouTube.com
  • Cartridge Case/Caliber Usage Chart

    Cartridge Case/Caliber Usage Chart

    Aperture/Datum Dia. Case Caliber


    17 Rem.; 204 Ruger; 220 Swift; 221 Fireball; 222 Rem.;
    222 Rem. Mag.; 223 Rem.; 6mmx45


    22-250; 22 Rem. BR; 22 PPC; 225 Win.; 6mm Rem. BR; 6mm PPC;
    6mm PPC/Wild; 6mm Dasher; 250 Sav.; 6.5mm GRENDEL; 300 AAC Blackout


    6mm Rem. (244); 6 x 47 Lapua; 6mm XC; 25-06 Rem.; 257 Roberts;
    6.5 x 57 Mauser; 6.5 x 47 Lapua; 6.5 x 55; 270 Win.;
    7 x 57 Mauser; 280 Rem (7mm Exp.); 303 British; 300 H&H Mag.;
    30-30 Win.; 30-40 Krag; 30-06 Spring./61A Ackley; 32 Win. Spec.


    243 Win.; 260 Rem.; 270 WSM; 7mm-08 Rem.; 308 Win.;
    308 National Match; 6.5 Creedmoor


    264 Win.; 6.5-284.; 7mm Rem. Mag.; 7mm WSM. 284 Win.; 7mm STW.;
    7mm Rem. Ultra Mag.; 300 Win. Mag.; 30-338 Win. Mag.; 300 Ultra Mag.;
    300 WSM; 8mm Rem. Mag.; 338 Win Mag.; 375 H&H; 338 Lapua; 300 Norma