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Rifles, Reloading, Optics, Equipment
Gunsmithing
Go NoGo Gauge Clarity
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<blockquote data-quote="J E Custom" data-source="post: 1839021" data-attributes="member: 2736"><p>The No Go gauge is used to tell you that the chamber is large or the lugs are set back to the point that the rifle "Should not be shot" because of possible case head separation that could render the weapon inoperable. It doesn't mean that it is unsafe. The military sets this dimension to prevent issues in the field that could cause the soldier to have problems that could be life threatening.</p><p> Normally if the bolt closes slightly on a no go gauge it will only be hard on cases and may eventually cause problems.</p><p></p><p>Head space can be more than the .006 and the fact that the brass cases are ductile means that for a few shots you may get away with it, but the magnums are a different story and many recommend holding it to .004 max.</p><p></p><p>If you have a rifle that a no go gauge will close on, you can do minimum sizing (Just enough to chamber) and brass life will improve because the cases are no longer SAMMI dimension but will work in that chamber and That is .006 thousandths longer than a SAMMI chamber. It isn't the size of the chamber, it's the size of the cartridge fired in the chamber that makes it risky.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1839021, member: 2736"] The No Go gauge is used to tell you that the chamber is large or the lugs are set back to the point that the rifle "Should not be shot" because of possible case head separation that could render the weapon inoperable. It doesn't mean that it is unsafe. The military sets this dimension to prevent issues in the field that could cause the soldier to have problems that could be life threatening. Normally if the bolt closes slightly on a no go gauge it will only be hard on cases and may eventually cause problems. Head space can be more than the .006 and the fact that the brass cases are ductile means that for a few shots you may get away with it, but the magnums are a different story and many recommend holding it to .004 max. If you have a rifle that a no go gauge will close on, you can do minimum sizing (Just enough to chamber) and brass life will improve because the cases are no longer SAMMI dimension but will work in that chamber and That is .006 thousandths longer than a SAMMI chamber. It isn't the size of the chamber, it's the size of the cartridge fired in the chamber that makes it risky. J E CUSTOM [/QUOTE]
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Go NoGo Gauge Clarity
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