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Rifles, Reloading, Optics, Equipment
Reloading
Lee collet die
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<blockquote data-quote="boomtube" data-source="post: 407334" data-attributes="member: 9215"><p>"I've read somewhere that the elasticity of the case is about .002. "</p><p> </p><p>It's more like half that, or even a tad less. Check it yourself, mike the neck of a loaded round, pull the bullet and mike it again, at exactly the same place. It won't be more than one thou difference.</p><p> </p><p> </p><p>Buck, the mandrel of your Lee Collet Neck Die is the neck diameter control, not the collet. All the collet fingers do is squeeze the neck into mandrel contact. </p><p> </p><p>You have "polished" the mandrel down too small at the squeze point so the remaining original diameter lower portion of the mandrel is acting as a conventional expander. That's NOT a big issue but it will help if you lube inside the necks now. Actually, it will also help if you back the die out a bit and/or reduce the lever pressure so the necks are sized a bit less than the absolute maximum.</p></blockquote><p></p>
[QUOTE="boomtube, post: 407334, member: 9215"] "I've read somewhere that the elasticity of the case is about .002. " It's more like half that, or even a tad less. Check it yourself, mike the neck of a loaded round, pull the bullet and mike it again, at exactly the same place. It won't be more than one thou difference. Buck, the mandrel of your Lee Collet Neck Die is the neck diameter control, not the collet. All the collet fingers do is squeeze the neck into mandrel contact. You have "polished" the mandrel down too small at the squeze point so the remaining original diameter lower portion of the mandrel is acting as a conventional expander. That's NOT a big issue but it will help if you lube inside the necks now. Actually, it will also help if you back the die out a bit and/or reduce the lever pressure so the necks are sized a bit less than the absolute maximum. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Lee collet die
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