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Rifles, Reloading, Optics, Equipment
Reloading
Need guidance...case neck thickness
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<blockquote data-quote="Alibiiv" data-source="post: 1594350" data-attributes="member: 69192"><p>You're right about the .001 thousandths runout, curious if the case necks were cleaned prior to turning the outside? The method that he is using with the mandrel that has been turned in the lathe ought to give "O" runout though. I did have a question about supporting the base of the case while they were being turned. If the RPMs on the lathe are high, the base could whip and cause the runout that he is getting when he checks the case necks with a dial indicator. If the case neck is not concentric with the case body to begin, the case neck thickness could be the same if checked with micrometers, however that does not mean that the case necks are concentric with the case body and that would show up when checking the necks with a dial indicator. Hope this makes sense to you?</p></blockquote><p></p>
[QUOTE="Alibiiv, post: 1594350, member: 69192"] You're right about the .001 thousandths runout, curious if the case necks were cleaned prior to turning the outside? The method that he is using with the mandrel that has been turned in the lathe ought to give "O" runout though. I did have a question about supporting the base of the case while they were being turned. If the RPMs on the lathe are high, the base could whip and cause the runout that he is getting when he checks the case necks with a dial indicator. If the case neck is not concentric with the case body to begin, the case neck thickness could be the same if checked with micrometers, however that does not mean that the case necks are concentric with the case body and that would show up when checking the necks with a dial indicator. Hope this makes sense to you? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Need guidance...case neck thickness
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