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The Range
Rifle & Shotgun Discussion
Accuracy issues with bull barrel rock river arms ar15- Tulsa ar builder to trust?
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<blockquote data-quote="Forgalspop" data-source="post: 4189983" data-attributes="member: 46636"><p>I have come to the conclusion that no two barrels are exactly the same, even by the same manufacture. Each barrel can have slightly different harmonics.</p><p></p><p>I have a Savage .243 that I have tried different ammo, different powders, different bullets, crimping vs. not crimping, annealing vs. not annealing, different seating depths, full length sizing vs only neck sizing, etc. and yet I cannot get tight groupings out of it.</p><p></p><p>I have a cheap Mossberg ATR100 in .270 that will group better than the more expensive (model 12)Savage .</p><p></p><p>If I were more anal, I might try getting into trying to adjust the harmonics of the .243 barrel. Just not worth the time and effort for me. I will just live with it. It still shoots well enough to be in decent groupings at 200 yards. Just not great.</p><p></p><p>A couple links to interesting articles about barrel harmonics.</p><p></p><p>[URL unfurl="true"]https://www.varmintal.com/atune.htm[/URL]</p><p></p><p>[URL unfurl="true"]https://www.varmintal.com/amode.htm[/URL]</p></blockquote><p></p>
[QUOTE="Forgalspop, post: 4189983, member: 46636"] I have come to the conclusion that no two barrels are exactly the same, even by the same manufacture. Each barrel can have slightly different harmonics. I have a Savage .243 that I have tried different ammo, different powders, different bullets, crimping vs. not crimping, annealing vs. not annealing, different seating depths, full length sizing vs only neck sizing, etc. and yet I cannot get tight groupings out of it. I have a cheap Mossberg ATR100 in .270 that will group better than the more expensive (model 12)Savage . If I were more anal, I might try getting into trying to adjust the harmonics of the .243 barrel. Just not worth the time and effort for me. I will just live with it. It still shoots well enough to be in decent groupings at 200 yards. Just not great. A couple links to interesting articles about barrel harmonics. [URL unfurl="true"]https://www.varmintal.com/atune.htm[/URL] [URL unfurl="true"]https://www.varmintal.com/amode.htm[/URL] [/QUOTE]
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