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Rifles, Reloading, Optics, Equipment
Gunsmithing
Barrel Blank Curve
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<blockquote data-quote="tobnpr" data-source="post: 2582885" data-attributes="member: 68758"><p>Typically I allow for about .002 "crush"- which allows for around 5-10 degrees rotation on a 16-20 tpi tenon.</p><p>Making sure your barrel shoulder and receiver ring are perfectly faced/perpendicular to the tenon mimimizes this. </p><p>This should end up at go + .001-.0005. Obviously a coarser pitch will affect headspace to a greater extent for any given amount of rotation.</p><p></p><p>I've never "not" used (nickel) anti-seize on final assembly, and if I've got the action on-hand the threads are always lubed with machine oil when test-fitting the receiver lest the threads gall during that process. You never want to try to fit threads dry. </p><p>Hard to quantify "how much"- not sparingly, but careful not to glom it on the threads- you don't want any to push out ahead of them onto the shoulders.</p><p></p><p>JMOYMMV.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 2582885, member: 68758"] Typically I allow for about .002 "crush"- which allows for around 5-10 degrees rotation on a 16-20 tpi tenon. Making sure your barrel shoulder and receiver ring are perfectly faced/perpendicular to the tenon mimimizes this. This should end up at go + .001-.0005. Obviously a coarser pitch will affect headspace to a greater extent for any given amount of rotation. I've never "not" used (nickel) anti-seize on final assembly, and if I've got the action on-hand the threads are always lubed with machine oil when test-fitting the receiver lest the threads gall during that process. You never want to try to fit threads dry. Hard to quantify "how much"- not sparingly, but careful not to glom it on the threads- you don't want any to push out ahead of them onto the shoulders. JMOYMMV. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Barrel Blank Curve
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