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Rifles, Reloading, Optics, Equipment
Reloading
Partial Neck Resizing Question
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<blockquote data-quote="Gene" data-source="post: 483540" data-attributes="member: 7402"><p>Tex - Your #2 is correct. But I have another concern: Do you know the neck diameter of the reamer used to chamber the barrel? If not, your gunsmith should know this diameter. Or, you could measure it using a micrometer on a fired round.</p><p></p><p>Next, take a loaded round and measure its neck diameter with a micrometer. How much difference between the loaded round diameter and the fired neck diameter? Your loaded cartridge neck should measure about .002 - .004" (or even more) less. If it does not, that could cause a tight loading sequence, and very high pressures. To correct it, you will need to turn the case necks down until you have enough clearance.</p></blockquote><p></p>
[QUOTE="Gene, post: 483540, member: 7402"] Tex - Your #2 is correct. But I have another concern: Do you know the neck diameter of the reamer used to chamber the barrel? If not, your gunsmith should know this diameter. Or, you could measure it using a micrometer on a fired round. Next, take a loaded round and measure its neck diameter with a micrometer. How much difference between the loaded round diameter and the fired neck diameter? Your loaded cartridge neck should measure about .002 - .004" (or even more) less. If it does not, that could cause a tight loading sequence, and very high pressures. To correct it, you will need to turn the case necks down until you have enough clearance. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Partial Neck Resizing Question
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