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Rifles, Reloading, Optics, Equipment
Reloading
COL question
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<blockquote data-quote="rscott5028" data-source="post: 541967" data-attributes="member: 24624"><p>I don't think SAAMI has a "COAL" spec for cartridges that correlates directly to what you're measuring with the Stoney Point... </p><p><a href="http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm-08%20Remington.pdf" target="_blank">http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm-08 Remington.pdf</a></p><p> </p><p>For 7mm-08, MIN length from headstamp to bullet tip is 2.530" and MAX is 2.800" and that has more to do with fitting factory ammo safely in the magazine and chamber. </p><p> </p><p>There's also no discussion about the allowable shape of the ogive. Hence, VLD bullets touching the Lands often exceed the MAX spec for fitting in the magazine. As such, handloaders either use the rifle as a single shot or modify their magazine to allow for the extra long bullets. </p><p> </p><p>As you shoot, the throat errodes and you may need to move your bullets out a tad farther to maintain accuracy. So, comparing COAL for 2 or more X-Bolt rifles is hardly worthwhile unless they are practically new. </p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 541967, member: 24624"] I don't think SAAMI has a "COAL" spec for cartridges that correlates directly to what you're measuring with the Stoney Point... [URL]http://www.saami.org/PubResources/CC_Drawings/Rifle/7mm-08%20Remington.pdf[/URL] For 7mm-08, MIN length from headstamp to bullet tip is 2.530" and MAX is 2.800" and that has more to do with fitting factory ammo safely in the magazine and chamber. There's also no discussion about the allowable shape of the ogive. Hence, VLD bullets touching the Lands often exceed the MAX spec for fitting in the magazine. As such, handloaders either use the rifle as a single shot or modify their magazine to allow for the extra long bullets. As you shoot, the throat errodes and you may need to move your bullets out a tad farther to maintain accuracy. So, comparing COAL for 2 or more X-Bolt rifles is hardly worthwhile unless they are practically new. -- richard [/QUOTE]
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