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Rifles, Reloading, Optics, Equipment
Gunsmithing
Thread tolerance/class?
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<blockquote data-quote="tobnpr" data-source="post: 1973936" data-attributes="member: 68758"><p>Hell, NO- don't proceed any further! You'll likely gall the threads- destroying the barrel, and requiring a smith to cut off the barrel to bore out the stub and save the receiver (if you're lucky).</p><p></p><p>Barrel threads should not be "tight"- slightly loose fit is fine, and is much preferred over a tight fit. This assures the shoulders (or nut to shoulder) can mate up precisely without resistance from the threads.</p><p></p><p>Assume you inspected the threads on the barrel for damage, foreign matter, etc.?</p><p></p><p>Sounds to me like the thread pitch on the new barrel is very slightly undersize. Bighorn tolerances are well under a thousandth- it's not their action with the issue.</p><p></p><p>If you have a micrometer and wires (or of course, a thread mike) you can measure the thread pitch of the barrel tenon, but you're going to need to send it back from whence it came...</p></blockquote><p></p>
[QUOTE="tobnpr, post: 1973936, member: 68758"] Hell, NO- don't proceed any further! You'll likely gall the threads- destroying the barrel, and requiring a smith to cut off the barrel to bore out the stub and save the receiver (if you're lucky). Barrel threads should not be "tight"- slightly loose fit is fine, and is much preferred over a tight fit. This assures the shoulders (or nut to shoulder) can mate up precisely without resistance from the threads. Assume you inspected the threads on the barrel for damage, foreign matter, etc.? Sounds to me like the thread pitch on the new barrel is very slightly undersize. Bighorn tolerances are well under a thousandth- it's not their action with the issue. If you have a micrometer and wires (or of course, a thread mike) you can measure the thread pitch of the barrel tenon, but you're going to need to send it back from whence it came... [/QUOTE]
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Thread tolerance/class?
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