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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Thread time and twist
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<blockquote data-quote="kopcicle" data-source="post: 2843983" data-attributes="member: 127100"><p>Having seen my share of shot out mouse guns during a penance in the armory many decades ago I noticed that the gas port was drilled wherever it landed. In the groove, on a land, half and half, it didn't seem to follow any pattern.</p><p></p><p>Fast forward to recent builds and tune-ups and I find that a fair portion of the quality barrels I have seen are drilled in the groove.</p><p></p><p>So here is the question. How is the barrel extension timed to the barrel such that the gas port finds the groove?</p><p>I have several ways I can "time" threads but each has its own problems and inaccuracies.</p><p>I'm kind of reduced to the build a dummy and measure off that process.</p><p></p><p>The whole point of this was I wanted to experiment with a few uncommon bores and cartridges but that is now moot.</p><p></p><p>Our Governor, Attorney General and Legislature feel that the public safety is more important than following their oath of office, honoring the constitution of the state of Washington, the constitution of the Divided States of America, and the word of law as given by the Supreme Court of the Divided States of America.</p><p></p><p>I still want to know how it's done <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="kopcicle, post: 2843983, member: 127100"] Having seen my share of shot out mouse guns during a penance in the armory many decades ago I noticed that the gas port was drilled wherever it landed. In the groove, on a land, half and half, it didn't seem to follow any pattern. Fast forward to recent builds and tune-ups and I find that a fair portion of the quality barrels I have seen are drilled in the groove. So here is the question. How is the barrel extension timed to the barrel such that the gas port finds the groove? I have several ways I can "time" threads but each has its own problems and inaccuracies. I'm kind of reduced to the build a dummy and measure off that process. The whole point of this was I wanted to experiment with a few uncommon bores and cartridges but that is now moot. Our Governor, Attorney General and Legislature feel that the public safety is more important than following their oath of office, honoring the constitution of the state of Washington, the constitution of the Divided States of America, and the word of law as given by the Supreme Court of the Divided States of America. I still want to know how it's done ;) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Thread time and twist
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