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The 6mm GT is a cartridge design from George Gardner (owner, GA Precision) and Tom Jacobs (owner, Vapor Trail Valley Bullets) that optimizes cartridge dimensions for low SD’s and extremely consistent performance both on the bench and in practical precision application (PRS style competitions).
- 35 degree shoulder for trouble-free feeding, specifically with detachable magazine systems.
- No magazine inserts or modifications required; just use standard out-of-box 308 Win. AICS or AW magazines.
- Optimal case efficiency nearing 100% volume usage @ 33-35 grains of Varget.
- 3020-3100 fps with 103-105 grain bullets or approximately 3000 fps with 115’s.
6mm ARC was initially designed for use in the AR-15 platform. It utilizes efficient, high-BC bullets to deliver unprecedented performance at longer ranges. Hornady’s 6mm ARC ammunition offerings will feature bullets selected to deliver ideal performance for hunting, match shooting and personal protection applications. Naturally this cartridge can also perform for you in a bolt action.
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Forster Datum Dial Kit$132.95
The Forster Datum Dial Kit makes it possible for the handloader or gunsmith to use ordinary dial calipers to make normally difficult length measurements based on the case shoulder. By measuring cases to the datum line on the shoulder, the reloader can custom-fit the ammunition to a rifle’s chamber for the best possible fit for better accuracy potential and longer case life.
The gold “bullet dials” makes it easy to accurately determine bullet seating depth measured from the ogive when changing the seater die setting or when checking loaded rounds for consistency. It can also be used to check the bullets alone for variations that could hurt accuracy.
The Complete Kit includes the Body with Case Dial for checking cases and two Bullet/Cartridge Dials. The #1 dial fits 224, 243, 264, 284, and 308 calibers. The #2 dial fits 172, 204, 257, 277, and 338.
Gunsmiths can easily check the length of customers reloads verses the chamber. Seating depth verses throat, and uniformity of ammunition. All errors that can make problems hard to diagnose.
This kit can also be used to double check headspace gauges if questions arise.
Included are complete instructions, storage box, and a laminated chart with common datum diameters.