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Rifles, Reloading, Optics, Equipment
Gunsmithing
Muzzle threading
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<blockquote data-quote="J E Custom" data-source="post: 1089824" data-attributes="member: 2736"><p>It is interesting, Thanks.</p><p></p><p>After seeing the video I decided to look/check some of the barrels that I have for this "condition"</p><p>because the largest threads I have used are 1/2x32 to 7/8x14 for muzzle brakes. I used reamer bushings that were tight at the muzzle and they all went well past the thread shoulder.</p><p></p><p>I did not find this phenomena in any of them, I did find barrels that were .000+at the muzzle because when the barrel maker contours a barrel he will place the tightest bore at the muzzle</p><p>(some even make a cut to force you to remove some of the barrel end because of lapping</p><p>wear).</p><p></p><p>The only place I have seen this barrel bore loosens at the muzzle is on rifles that were cleaned from the muzzle. (The cleaning rods wear the muzzle).</p><p></p><p>I always use the largest threads possible and use double stress relieved barrels. I don't know it this is the reason that I did not find any problems with increasing bore diameters, But if the threads are not properly cut, and the barrel wall is to thin, and the brake is over tightened it is possible to create a condition that could hurt accuracy.</p><p></p><p>So In my opinion, Thread size has nothing to do with this condition if done properly. It would be nice if every rifle had a barrel large enough to place 7/8 threads or larger on, but that is just not going to happen because most barrels are to small for even 11/16 threads and 5/8 threads can't be used sometimes.</p><p></p><p>I for one will keep checking for my self to see if this occurs and if it does why.</p><p></p><p>Thanks again. It does bring up questions and concerns.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1089824, member: 2736"] It is interesting, Thanks. After seeing the video I decided to look/check some of the barrels that I have for this "condition" because the largest threads I have used are 1/2x32 to 7/8x14 for muzzle brakes. I used reamer bushings that were tight at the muzzle and they all went well past the thread shoulder. I did not find this phenomena in any of them, I did find barrels that were .000+at the muzzle because when the barrel maker contours a barrel he will place the tightest bore at the muzzle (some even make a cut to force you to remove some of the barrel end because of lapping wear). The only place I have seen this barrel bore loosens at the muzzle is on rifles that were cleaned from the muzzle. (The cleaning rods wear the muzzle). I always use the largest threads possible and use double stress relieved barrels. I don't know it this is the reason that I did not find any problems with increasing bore diameters, But if the threads are not properly cut, and the barrel wall is to thin, and the brake is over tightened it is possible to create a condition that could hurt accuracy. So In my opinion, Thread size has nothing to do with this condition if done properly. It would be nice if every rifle had a barrel large enough to place 7/8 threads or larger on, but that is just not going to happen because most barrels are to small for even 11/16 threads and 5/8 threads can't be used sometimes. I for one will keep checking for my self to see if this occurs and if it does why. Thanks again. It does bring up questions and concerns. J E CUSTOM [/QUOTE]
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