Belted Magnum (.535) Headspace Gauges

Your Price: $39.50

Compatibility: 244 H&H, 257 WBY Mag , 257 STW, 264 Win Mag, 270 WBY Mag, 275 H&H, 300 H&H, 300 WBY Mag, 300 Win Mag, 338 Wby Mag, 338 Win Mag, 340 Wby Mag, 350 Rem Mag, 375 H&H, 375 Super Mashburn Mag, 375 WBY Mag, 400 H&H, 416 Rem Mag, 416 Taylor, 425 Express, 458 Lott, 458 Win Mag, 7mm Rem Mag, 7mm STW, 7mm Mashburn Super Mag, 7mm Practical, 7mm Wby Mag 8mm Rem Mag NOTE WBY ONLY HAS .004. FROM MIN TO MAX. THE NO GO IS .001 SHORTER THEN STD. NO GO, AND THERE IS NO FIELD. Most Of The Ackley Improved Mags

Part Number: GAU-12520

Availability: In Stock.

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Description

Pacific Tool and Gauge offers five lengths of headspace gauges per rifle caliber on chambers listed by both SAAMI and CIP. In order from the shortest to longest, they are: GO/CIP-MIN, CIP-MAX, NO-GO, and FIELD. 0.0005" tolerance

SAAMI GO: Corresponds to the minimum chamber dimensions. If a rifle closes on a GO gauge, the chamber will accept ammunition that is made to SAAMI’s maximum specifications. The GO gauge is essential for checking a newly-reamed chamber in order to ensure a tight, accurate and safe chamber that will accept SAAMI maximum ammo. Although the GO gauge is necessary for a gunsmith or armorer, it usually has fewer applications for the collector or surplus firearms purchaser.
NO-GO: Corresponds to the maximum headspace Forster recommends for gunsmiths chambering new, bolt action rifles. This is NOT a SAAMI-maximum measurement. If a rifle closes on a NO-GO gauge, 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 gauge. The NO-GO gauge is a valuable tool for checking a newly-reamed chamber in order to ensure a tight and accurate chamber.
SAAMI FIELD: Corresponds to the longest safe headspace. If a rifle closes on a FIELD gauge, its chamber is dangerously close to, or longer than, SAAMI’s specified maximum chamber size. If chamber headspace is excessive, the gun should be taken out of service until it has been inspected and repaired by a competent gunsmith. FIELD gauges are slightly shorter than the SAAMI maximum in order to give a small safety margin.
CIP Min: Corresponds to CIP minimum chamber dimensions.
CIP Max: Corresponds to the CIP maximum chamber dimensions.

We also offer Incremental Gauges in 11 pc and 14 pc military sets. Minimum chamber length to Maximum in .001" increments. +-.0001"

Cross-compatibility: Many of our headspace gauges are compatible with multiple chamber specifications. For instance, .30-06 Springfield headspace gauges are usable in .25-06, .270 Winchester, 6.5-06, 8mm-06, .338-06, and .35 Whelen chambers. We list known compatible chambers with each headspace gauge product. Refer to our Compatible Headspace Gauge Chart below or ask your sales representative if your gauge is cross-compatible.

Our chart is available here: Headspace Compatible Chart

Belted Magnum (.535) Headspace Gauges

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