{"product_id":"forster-headspace-gauge-067-no-go-303-british","title":"Forster No-Go Headspace Gauge 303 British","description":"\u003cp\u003eImproper headspace \u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003emay be dangerous to the  shooter as well as an impairment to accuracy. The proper use of a  Headspace Gage is the most reliable way to test the length of a rifle  chamber. Forster Headspace Gages are made to exacting manufacturing  standards to ensure accurate testing of your rifle's chamber.  \u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003eForster  offers three lengths of headspace gages per rifle caliber. In order  from the shortest to longest, they are: GO, NO-GO and FIELD:\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003col\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003e\u003cspan style=\"font-family: Verdana; color: #000000; font-size: x-small;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eGO:\u003c\/strong\u003e Corresponds to the minimum chamber dimensions. If a rifle closes on a  GO gage, the chamber will accept ammunition that is made to SAAMI’s  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 ammo. Although the GO gage is  necessary for a gunsmith or armorer, it usually has fewer applications  for the collector or surplus firearms purchaser. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNO-GO:\u003c\/strong\u003e Corresponds to the maximum headspace  recommended for gunsmiths chambering new firearms. This is NOT a  SAAMI-maximum measurement. If a rifle 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 essential for checking a  newly-reamed chamber in order to ensure a tight and accurate chamber. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFIELD:\u003c\/strong\u003e Corresponds to the longest safe  headspace. If a rifle closes on a FIELD gage, 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  gages are slightly shorter than the SAAMI maximum in order to give a  small safety margin.\u003c\/li\u003e\n\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/ol\u003e","brand":"Forster","offers":[{"title":"Default Title","offer_id":46446667169923,"sku":"FRBG303N","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/5128\/2819\/files\/4894.jpg?v=1772034552","url":"https:\/\/grafs.com\/products\/forster-headspace-gauge-067-no-go-303-british","provider":"Graf \u0026 Sons","version":"1.0","type":"link"}