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Rifles, Reloading, Optics, Equipment
Reloading
I seriously doubt this is case head separation but what do you guys think?
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<blockquote data-quote="bigedp51" data-source="post: 1411920" data-attributes="member: 28965"><p>The SAAMI chamber and cartridge drawings has headspace listed as min and max with .010 between the two settings.</p><p></p><p> In the SAAMI drawing below for the .308 Win it lists 1.630 min and 1.640 as max</p><p>There are three different headspace gauge lengths GO, NO-GO and Field and Field is the maximum safe headspace length.</p><p><img src="https://i.imgur.com/L6eq7Cc.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below are three British headspace gauges, the GO is .064, the NO-GO is .067 (American SAAMI standards)</p><p>and max is .074. (or SAAMI Field)</p><p></p><p>The British military only used the .064 and .074 gauge and long as the bolt did not close on the .074 gauge the rifle was in survivable condition.</p><p></p><p><img src="https://i.imgur.com/Ihc1Ywv.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below is my Colt AR15 Field gauge at 1.4736 and as long as my AR15 bolts do not close on this gauge my AR15 is within safe headspace limits. Meaning a new rifles headspace is set between the GO and NO-GO gauges and as the rifle wears the headspace is allowed to increase beyond the NO-GO gauge and to the Field gauge limits. And my AR15 carbine has to wear .0066 before reaching Field gauge limits.</p><p></p><p><img src="https://i.imgur.com/MLSZTeH.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1411920, member: 28965"] The SAAMI chamber and cartridge drawings has headspace listed as min and max with .010 between the two settings. In the SAAMI drawing below for the .308 Win it lists 1.630 min and 1.640 as max There are three different headspace gauge lengths GO, NO-GO and Field and Field is the maximum safe headspace length. [IMG]https://i.imgur.com/L6eq7Cc.jpg[/IMG] Below are three British headspace gauges, the GO is .064, the NO-GO is .067 (American SAAMI standards) and max is .074. (or SAAMI Field) The British military only used the .064 and .074 gauge and long as the bolt did not close on the .074 gauge the rifle was in survivable condition. [IMG]https://i.imgur.com/Ihc1Ywv.jpg[/IMG] Below is my Colt AR15 Field gauge at 1.4736 and as long as my AR15 bolts do not close on this gauge my AR15 is within safe headspace limits. Meaning a new rifles headspace is set between the GO and NO-GO gauges and as the rifle wears the headspace is allowed to increase beyond the NO-GO gauge and to the Field gauge limits. And my AR15 carbine has to wear .0066 before reaching Field gauge limits. [IMG]https://i.imgur.com/MLSZTeH.jpg[/IMG] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
I seriously doubt this is case head separation but what do you guys think?
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