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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
neck runout with redding bushing dies???
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<blockquote data-quote="CatShooter" data-source="post: 25785" data-attributes="member: 7"><p>First off... the nice thing about the bushing dies is that you DON'T use an expander ball. Just use the bushing that gives you the finished neck size you need.</p><p></p><p>But to address the real problem. If the necks are not uniform in thckness all around, you will get sized necks that are off center.</p><p></p><p>Supose that the necks are 0.015 on one side, and 0.010 on the other. </p><p></p><p>If fired in a PERFECT chamber, and the outside of the case has 0.0000" runout, the neck center axis (of the empty space) will have an error of 0.0025" compared to the outer surface.</p><p></p><p>So you are starting off with a problem... now when you size it, the thinner side will size more than the thicker size, so you can wind up with anything in the way of error.</p><p></p><p>But... a finished runout of 0.002" should not cause any lose of sleep, unless you are anal compulsive.</p><p></p><p>CatShooter</p></blockquote><p></p>
[QUOTE="CatShooter, post: 25785, member: 7"] First off... the nice thing about the bushing dies is that you DON'T use an expander ball. Just use the bushing that gives you the finished neck size you need. But to address the real problem. If the necks are not uniform in thckness all around, you will get sized necks that are off center. Supose that the necks are 0.015 on one side, and 0.010 on the other. If fired in a PERFECT chamber, and the outside of the case has 0.0000" runout, the neck center axis (of the empty space) will have an error of 0.0025" compared to the outer surface. So you are starting off with a problem... now when you size it, the thinner side will size more than the thicker size, so you can wind up with anything in the way of error. But... a finished runout of 0.002" should not cause any lose of sleep, unless you are anal compulsive. CatShooter [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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neck runout with redding bushing dies???
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