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The Range
Ammo & Reloading
Bullet runout/Concentricity
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<blockquote data-quote="Calamity Jake" data-source="post: 3872581" data-attributes="member: 12219"><p>I to check runout(not concentricity) of the bullet to the case,</p><p>This is all that can be checked because there is no way to establish the true centerline of the case.</p><p>All of these runout gages that we use relies on the outside case diameter not the case centerline.</p><p>There no tools made that can establish centerline because of the design of the case.</p><p>Any out of roundness in the case body affects runout.</p><p>Even if the cases were made on a lathe there would be on way to establish true centerline.</p></blockquote><p></p>
[QUOTE="Calamity Jake, post: 3872581, member: 12219"] I to check runout(not concentricity) of the bullet to the case, This is all that can be checked because there is no way to establish the true centerline of the case. All of these runout gages that we use relies on the outside case diameter not the case centerline. There no tools made that can establish centerline because of the design of the case. Any out of roundness in the case body affects runout. Even if the cases were made on a lathe there would be on way to establish true centerline. [/QUOTE]
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Bullet runout/Concentricity
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