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The Range
Rifle & Shotgun Discussion
barrel twist rate question
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<blockquote data-quote="wps" data-source="post: 111426" data-attributes="member: 828"><p>When talking twist rates, and bullet weights I think it's important to seperate military versus civilian bullets.</p><p></p><p>The post from the ammo oracle above addresses some of this.</p><p></p><p>Military bullets are more forgiving with varying twist rates, so one could get by with 1/9, or 1/7 on most available military ammo.</p><p></p><p>Lighter weight civilian (commercial) bullets can work on a 1/7, but this is very dependent on jacket thickness. If the jacket is thin the bullet will probably disentegrate shortly after it leaves the barrel. I shoot both 50, and 52 grain varmit bullets out of my 1/9, and I get occasional disentegration even with this twist, so a faster twist in this case just wouldn't work. 40 grain bullets don't work at all in my barrel. I just as well throw rocks at the target.</p><p></p><p>I think some barrels just prefer some bullets over others.</p><p></p><p>All this is just my opinion from field tests, which are far from scientific in my case. <img src="/images/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /> </p><p></p><p>WPS.</p></blockquote><p></p>
[QUOTE="wps, post: 111426, member: 828"] When talking twist rates, and bullet weights I think it's important to seperate military versus civilian bullets. The post from the ammo oracle above addresses some of this. Military bullets are more forgiving with varying twist rates, so one could get by with 1/9, or 1/7 on most available military ammo. Lighter weight civilian (commercial) bullets can work on a 1/7, but this is very dependent on jacket thickness. If the jacket is thin the bullet will probably disentegrate shortly after it leaves the barrel. I shoot both 50, and 52 grain varmit bullets out of my 1/9, and I get occasional disentegration even with this twist, so a faster twist in this case just wouldn't work. 40 grain bullets don't work at all in my barrel. I just as well throw rocks at the target. I think some barrels just prefer some bullets over others. All this is just my opinion from field tests, which are far from scientific in my case. :) WPS. [/QUOTE]
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