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Forster Headspace Gauge Set
Forster Headspace Gauge Set
The Forster Headspace Gauge is designed to ensure accurate testing of chamber headspace. Headspace is the distance between the face of the breech and the base of the cartridge when the action is closed. Safety  and accuracy are threatened when excessive headspace exists.

For best results with bolt action rifles, remove the extractor from the bolt. The bolt must work freely in the receiver. It is impossible to have the proper feel for a gauge if the bolt is too tight or sticky.

Insert the proper gauge into the action. Attempt to close the bolt on the gauge. CAUTION - NEVER FORCE THE BOLT CLOSED on a gauge. A rifle with correct headspace should close easily and without feel on the GO Gauge, but should not close on the FIELD gauge. If it does close on the NO-GO gauge, but not on the FIELD gauge, the rifle may still be serviceable. However, it is not advisable to use it for best accuracy with factory ammunition.

CAUTION - ANY RIFLE THAT WILL CLOSE ON THE FIELD GAUGE MAY HAVE DANGEROUSLY EXCESSIVE HEADSPACE AND SHOULD NOT BE FIRED UNDER ANY CIRCUMSTANCES.

There are 3 lengths of headspace gauges available per caliber:, GO, NO-GO & FIELD. 

You may purchase gauges separately, or as a set, or rent a set of gauges.

GO length - This checks the rifle to see that the chamber will accept cartridges made to maximum SAAMI specifications.

NO-GO length - This is used by most gunsmiths as a maximum headspace gauge when chambering a rifle's headspace dimension. If a rifle closes on a NO-GO gauge it may have excessive headspace. If a rifle closes on a NO-GO gauge, it may still be within the SAAMI Rifle Chanber tolerance. Next, it should be checked with a FIELD gauge.

FIELD length - If a rifle closes on a FIELD gauge, its chamber is dangerously close to, or longer than, SAAMI's specified maximum chamber size.  This is the longest of the three gauge lengths.

If you only have more than  3  rifles in each caliber to check, it may be  cheaper for you to purchase a set of gauges rather than rent. To view, on our  home page please select  Measuring & Gauges, then select Headspace Gauges.
 
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List Price: $169.95
Price: $158.95
143.06 AUD

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