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Rifles, Reloading, Optics, Equipment
Reloading
Bushing size question
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<blockquote data-quote="dok7mm" data-source="post: 1123544" data-attributes="member: 90080"><p>Sure, say your Norma loaded round is .313 and your chamber neck turns out to be .318" and you want the standard .002 neck tension. That means you are sizing down from .317" (don't forget the springback ) to .311" (.002" below loaded nk dia ). From .317" to .311" is too far to take nk down in one step. It will cause your .311 target size to become .309 or.310" -- below what you wanted --- and cause very eratic amounts of neck tension. If you have a similar situation after you measure chamber nk and loaded rd nk, you must use a two step bushing method. In this case, we would neck size first w/ a .314 bushing and then your .311 bushing.</p></blockquote><p></p>
[QUOTE="dok7mm, post: 1123544, member: 90080"] Sure, say your Norma loaded round is .313 and your chamber neck turns out to be .318" and you want the standard .002 neck tension. That means you are sizing down from .317" (don't forget the springback ) to .311" (.002" below loaded nk dia ). From .317" to .311" is too far to take nk down in one step. It will cause your .311 target size to become .309 or.310" -- below what you wanted --- and cause very eratic amounts of neck tension. If you have a similar situation after you measure chamber nk and loaded rd nk, you must use a two step bushing method. In this case, we would neck size first w/ a .314 bushing and then your .311 bushing. [/QUOTE]
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Bushing size question
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