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Rifles, Reloading, Optics, Equipment
Reloading
Measuring Die Neck Diameter without Pin Gauges?
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<blockquote data-quote="DrSteve" data-source="post: 2110031" data-attributes="member: 114341"><p>I agree with you about not being able to change the diameter without lapping, but knowing the precise diameter would still let me know what the tension would be for different thicknesses of brass, and the stock RCBS die might coincidentally happen to be a good match "as-is" for one type of brass or another. For example, my 6.5 Creedmoor Remington brass measures .012" neck thickness and my Lapua measures .014". Using Forster's die honing recommendations, if the RCBS die is at their max diameter tolerance (.285"), it's a good fit (loaded round -.003") for using on my Remington brass <strong>without</strong> an expander ball. If it's right on spec (.283), it's a good fit (loaded round -.005") for using on Remington brass <strong>with</strong> an expander.</p></blockquote><p></p>
[QUOTE="DrSteve, post: 2110031, member: 114341"] I agree with you about not being able to change the diameter without lapping, but knowing the precise diameter would still let me know what the tension would be for different thicknesses of brass, and the stock RCBS die might coincidentally happen to be a good match "as-is" for one type of brass or another. For example, my 6.5 Creedmoor Remington brass measures .012" neck thickness and my Lapua measures .014". Using Forster's die honing recommendations, if the RCBS die is at their max diameter tolerance (.285"), it's a good fit (loaded round -.003") for using on my Remington brass [B]without[/B] an expander ball. If it's right on spec (.283), it's a good fit (loaded round -.005") for using on Remington brass [B]with[/B] an expander. [/QUOTE]
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Measuring Die Neck Diameter without Pin Gauges?
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