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Rifles, Reloading, Optics, Equipment
Reloading
Setting neck tension with expander mandrel and bushing die questions
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<blockquote data-quote="antelopedundee" data-source="post: 1883179" data-attributes="member: 107384"><p>Some people ream the inside of the neck when they/you end up getting "donut/ring" near the neck shoulder junction. Otherwise I would think that if the mandrel itself is round that it will exit the neck and leave it round and concentric as well. In the past I have seen a few new cases where the neck was knocked sideways a tad and thus would would not be concentric with the bore. If your necks are of uniform thickness, then running them up into a properly aligned die will leave them concentric inside and outside. It's possible to turn your case necks thin enough so that running them into a die would require no expansion afterwards except by the bullet. Never personally took it to that extreme. A moderator over at accuratereloader.com did some testing and decided that neck tension had little or no effect on group size.</p></blockquote><p></p>
[QUOTE="antelopedundee, post: 1883179, member: 107384"] Some people ream the inside of the neck when they/you end up getting "donut/ring" near the neck shoulder junction. Otherwise I would think that if the mandrel itself is round that it will exit the neck and leave it round and concentric as well. In the past I have seen a few new cases where the neck was knocked sideways a tad and thus would would not be concentric with the bore. If your necks are of uniform thickness, then running them up into a properly aligned die will leave them concentric inside and outside. It's possible to turn your case necks thin enough so that running them into a die would require no expansion afterwards except by the bullet. Never personally took it to that extreme. A moderator over at accuratereloader.com did some testing and decided that neck tension had little or no effect on group size. [/QUOTE]
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Reloading
Setting neck tension with expander mandrel and bushing die questions
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