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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: 1409843" data-attributes="member: 28965"><p>You are incorrect, British military headspace is .064 minimum and .074 max with "NO" in-between headspace settings.</p><p></p><p>The American SAAMI headspace is .064 GO and .067 NO-GO and this is for setting headspace on a new rifle. Meaning you have three thousandths to play with when setting up the new or rebarreled rifle. And the SAAMI rim thickness can be from .054 to .064</p><p></p><p>Below is a SAAMI cartridge and chamber drawing for the .308 Winchester and minimum headspace is 1.630 and maximum headspace is 1.640 with ten thousandths between min and max headspace. And the GO gauge is 1.630 and the NO-GO gauge is 1.634 and is used for setting up a new rifle.</p><p></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 a set of .308 Winchester gauges in .001 increments, and used to check the amount of headspace increase out to maximum headspace or the Field gauge. Meaning you don't replace the bolt or re-barrel the rifle when the headspace is longer than the NO-GO gauge at 1.634 because you still have .006 left before you reach maximum headspace of 1.640.</p><p></p><p><img src="https://i.imgur.com/rNoQCt0.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Bottom line, I hope you do not think a rifle is worn out when headspace increases past the NO-GO gauge when the SAAMI gives you .010 headspace to play with.</p><p></p><p>The British used two oiled proof cartridges to proof check the Enfield rifle and if the headspace increased .003 or more the rifle failed proof testing due to lug setback. But in normal service if the Enfield rifle bolt closed on the .074 headspace gauge with the longest #3 bolt head the bolt was replaced. If the bolt was replaced and the rifle failed the .074 gauge the rifle was sent back for overhaul.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1409843, member: 28965"] You are incorrect, British military headspace is .064 minimum and .074 max with "NO" in-between headspace settings. The American SAAMI headspace is .064 GO and .067 NO-GO and this is for setting headspace on a new rifle. Meaning you have three thousandths to play with when setting up the new or rebarreled rifle. And the SAAMI rim thickness can be from .054 to .064 Below is a SAAMI cartridge and chamber drawing for the .308 Winchester and minimum headspace is 1.630 and maximum headspace is 1.640 with ten thousandths between min and max headspace. And the GO gauge is 1.630 and the NO-GO gauge is 1.634 and is used for setting up a new rifle. [IMG]https://i.imgur.com/L6eq7Cc.jpg[/IMG] Below are a set of .308 Winchester gauges in .001 increments, and used to check the amount of headspace increase out to maximum headspace or the Field gauge. Meaning you don't replace the bolt or re-barrel the rifle when the headspace is longer than the NO-GO gauge at 1.634 because you still have .006 left before you reach maximum headspace of 1.640. [IMG]https://i.imgur.com/rNoQCt0.jpg[/IMG] Bottom line, I hope you do not think a rifle is worn out when headspace increases past the NO-GO gauge when the SAAMI gives you .010 headspace to play with. The British used two oiled proof cartridges to proof check the Enfield rifle and if the headspace increased .003 or more the rifle failed proof testing due to lug setback. But in normal service if the Enfield rifle bolt closed on the .074 headspace gauge with the longest #3 bolt head the bolt was replaced. If the bolt was replaced and the rifle failed the .074 gauge the rifle was sent back for overhaul. [/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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