300 AAC Blackout Headspace Gauge Set GO and NO-GO

Description: Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your ’s chamber. If a closes on a GO gage, the chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a closes on a NOGO gage, the chamber might have excessive headspace. Most gunsmiths chamber a ’s headspace between the GO and NOGO dimensions. If a closes on a FIELD gage, the chamber is dangerously close to or already over the SAAMI specified maximum chamber size. 300 AAC BLACKOUT: Use to check headspace of 300 AAC Blackout RIMLESS CARTRIDGE HEADSPACE: The proper use of Headspace Gages is the most reliable way to test chamber length. Headspace in a rimless cartridge is the distance between the bolt face and a datum line, determined by SAAMI, where the front of the cartridge rests on its shoulder when the bolt is closed. NO-GO: Corresponds to the maximum headspace we recommend for gunsmiths’ chambering new bolt-action rifles. This is not a SAAMI-maximum measurement. If a closes on a NO-GO gage, it may still be within SAAMI specifications, or it may have excessive headspace. To determine if there is excessive headspace, the chamber should then be checked with a FIELD gage. The NO-GO gage is a valuable tool for gunsmiths’ reaming new chambers, in order to ensure tight and accurate headspace GO: Corresponds to the minimum chamber dimensions. If a closes on a GO gage, the chamber will accept ammunition that is made to SAAMI maximum specifications. The GO gage is essential for checking a newly-reamed chamber in order to ensure a tight, accurate, and safe chamber that will accept SAAMI maximum . PRECISION MACHINED: Manufactured from top-quality, hardened steel and precision ground to ANSI and SAAMI tolerances. Headspace tolerance ground to a very exacting ±.00015. Each Headspace Gage thoroughly inspected with NIST-certified measurement tools to ensure the highest quality product.

Price: 114.17 USD

Location: Simpsonville, Kentucky

End Time: 2025-01-09T09:17:11.000Z

Shipping Cost: 0 USD