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Rifles, Reloading, Optics, Equipment
Reloading
Excessive case expansion question
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<blockquote data-quote="jarnold37" data-source="post: 2418131" data-attributes="member: 29241"><p>When I first started fitting and chambering, I ended up with a chamber that expanded almost 7 thousands at the web. Bought a new bigger lathe soon after and learned that the tailstock was 2 and 7 tenths high. Most are made that way. The tailstock is not the gunsmiths friend. Even though it was aligned left and right, it was out almost 3 thousands high. Took to a machine shop and had it surface ground down to alignment. If a reamer is pushed in cutting a chamber, and the back end is 3 thousands high, it will produce a fat chamber. Magnum cartridges are even more troublesome as it allows the belt to swell to this oversize dimension and it can not be sized back down.</p></blockquote><p></p>
[QUOTE="jarnold37, post: 2418131, member: 29241"] When I first started fitting and chambering, I ended up with a chamber that expanded almost 7 thousands at the web. Bought a new bigger lathe soon after and learned that the tailstock was 2 and 7 tenths high. Most are made that way. The tailstock is not the gunsmiths friend. Even though it was aligned left and right, it was out almost 3 thousands high. Took to a machine shop and had it surface ground down to alignment. If a reamer is pushed in cutting a chamber, and the back end is 3 thousands high, it will produce a fat chamber. Magnum cartridges are even more troublesome as it allows the belt to swell to this oversize dimension and it can not be sized back down. [/QUOTE]
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Reloading
Excessive case expansion question
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