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Rifles, Reloading, Optics, Equipment
Reloading
Weird 308 brass
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<blockquote data-quote="jarnold37" data-source="post: 1959881" data-attributes="member: 29241"><p>when chatter occurs during reaming, the result is the presence of lines are straight and are equally spaced. It is a harmonic resonance that occurs with the gearing of the lathe. And yes that is what the result of chatter does. I questioned several top gunsmiths and reamer manufacturers, on how to prevent and the answer was if you have chatter in reaming there will be a high pitch squeal and perfectly spaced lines or ridges running equal distance the length of the case. External chatter as on turning and reducing diameter of long item that is not supported will produce a different chatter not lines but rough surface finish that oddly those rough marks are symmetrical . If a case has been fired in a chamber that has chattered when chambered that case will not usually not re chamber unless full resized.</p></blockquote><p></p>
[QUOTE="jarnold37, post: 1959881, member: 29241"] when chatter occurs during reaming, the result is the presence of lines are straight and are equally spaced. It is a harmonic resonance that occurs with the gearing of the lathe. And yes that is what the result of chatter does. I questioned several top gunsmiths and reamer manufacturers, on how to prevent and the answer was if you have chatter in reaming there will be a high pitch squeal and perfectly spaced lines or ridges running equal distance the length of the case. External chatter as on turning and reducing diameter of long item that is not supported will produce a different chatter not lines but rough surface finish that oddly those rough marks are symmetrical . If a case has been fired in a chamber that has chattered when chambered that case will not usually not re chamber unless full resized. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Weird 308 brass
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