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Rifles, Reloading, Optics, Equipment
Gunsmithing
AR Barrel chambering methods
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<blockquote data-quote="jrock" data-source="post: 1809767" data-attributes="member: 78569"><p>I've learned that there are two basic theories for the two points about which a barrel is dialed.</p><p>1. Dial in muzzle and breach</p><p>2. Dial in neck and lead area, which then requires the muzzle to be clocked</p><p></p><p>I'm working on an AR 15 barrel blank and want to locate the gas port relative to the lands and grooves. </p><p></p><p>If I use Method 1, the chamber will be aligned with the muzzle and breach. The gas port would be located by rotating the barrel a fraction of a turn to get the lands and groves lined up. Then extension would then be installed and clocked to the port. </p><p></p><p>If I use Method 2, the chamber would be clocked to the muzzle which is pointing up. Therefore, the barrel can't be rotated to locate the gas port. The only way to locate the gas port would be to move it up and down the barrel length corresponding with the twist rate and number of lands and groves. This could require several inches of movement which the blank may not have. </p><p></p><p>Seems Method 1 is the best way to align everything. Just doing my research as I haven't tried Method 1 before.</p><p></p><p>Looking for some affirmation from others.</p></blockquote><p></p>
[QUOTE="jrock, post: 1809767, member: 78569"] I've learned that there are two basic theories for the two points about which a barrel is dialed. 1. Dial in muzzle and breach 2. Dial in neck and lead area, which then requires the muzzle to be clocked I'm working on an AR 15 barrel blank and want to locate the gas port relative to the lands and grooves. If I use Method 1, the chamber will be aligned with the muzzle and breach. The gas port would be located by rotating the barrel a fraction of a turn to get the lands and groves lined up. Then extension would then be installed and clocked to the port. If I use Method 2, the chamber would be clocked to the muzzle which is pointing up. Therefore, the barrel can't be rotated to locate the gas port. The only way to locate the gas port would be to move it up and down the barrel length corresponding with the twist rate and number of lands and groves. This could require several inches of movement which the blank may not have. Seems Method 1 is the best way to align everything. Just doing my research as I haven't tried Method 1 before. Looking for some affirmation from others. [/QUOTE]
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AR Barrel chambering methods
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