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The Range
Rifle & Shotgun Discussion
1:7 vs. 1:9 on 10.5" barrel
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<blockquote data-quote="idleclamp" data-source="post: 718085" data-attributes="member: 1256"><p>Hi everyone,</p><p></p><p>While I'm waiting for a Form 1 to get back to me, I've been doing research what twist to get in a barrel. I've received good arguments for both, and that's the only twist I can find for a 10.5" barrel.</p><p></p><p>My SBR will have a suppressor on it, so baffle strikes are a concern, especially if I want to try and slow it to subsonic, which is the argument for the 1:7 to get heavy bullets spinning in 10.5 inches. So is a 1:7 twist necessary to get a heavy bullet spinning (69-95 grains)?</p><p></p><p>The next argument I was told is that if I want to shoot 55 grainers, a 1:7 will spin the jacket off of the bullet, hence needing a 1:9. I don't know enough about it to make a good educated decision and have heard arguments both ways which is why I'm posting.<img src="/images/smilies/new/ThankYou2.gif" class="smilie" loading="lazy" alt=":thanku:" title="ThankYou :thanku:" data-shortname=":thanku:" /></p></blockquote><p></p>
[QUOTE="idleclamp, post: 718085, member: 1256"] Hi everyone, While I'm waiting for a Form 1 to get back to me, I've been doing research what twist to get in a barrel. I've received good arguments for both, and that's the only twist I can find for a 10.5" barrel. My SBR will have a suppressor on it, so baffle strikes are a concern, especially if I want to try and slow it to subsonic, which is the argument for the 1:7 to get heavy bullets spinning in 10.5 inches. So is a 1:7 twist necessary to get a heavy bullet spinning (69-95 grains)? The next argument I was told is that if I want to shoot 55 grainers, a 1:7 will spin the jacket off of the bullet, hence needing a 1:9. I don't know enough about it to make a good educated decision and have heard arguments both ways which is why I'm posting.:thanku: [/QUOTE]
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1:7 vs. 1:9 on 10.5" barrel
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