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Rifles, Reloading, Optics, Equipment
Reloading
Neck Sizing
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<blockquote data-quote="Greyfox" data-source="post: 827391" data-attributes="member: 10291"><p>I have experienced this, particularly with RCBS FL and NS non bushing type dyes. These dyes will oversize the neck on the downstroke of he press, then, using the expander on the upstroke, bring the neck up to a larger size. This can be .002-004". The bigger issue is that unless the stem is perfectly straight, you can get high runout. It also overworks the neck requiring frequent annealing and shorter case life. I have found that partial neck sizing is best accomplished with the competition, bushing type dyes, with a micrometer adjustment for neck sizing. The other alternative is to have a custom dye made. With my hunting and tactical competition rifles I generally don't partial size my necks other than leaving about 1/16th or a little less of an inch of unsized neck measured from the shoulder, and rarely use an expander. I get good accuracy, little runout, and good case life using this approach.IMO.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 827391, member: 10291"] I have experienced this, particularly with RCBS FL and NS non bushing type dyes. These dyes will oversize the neck on the downstroke of he press, then, using the expander on the upstroke, bring the neck up to a larger size. This can be .002-004". The bigger issue is that unless the stem is perfectly straight, you can get high runout. It also overworks the neck requiring frequent annealing and shorter case life. I have found that partial neck sizing is best accomplished with the competition, bushing type dyes, with a micrometer adjustment for neck sizing. The other alternative is to have a custom dye made. With my hunting and tactical competition rifles I generally don't partial size my necks other than leaving about 1/16th or a little less of an inch of unsized neck measured from the shoulder, and rarely use an expander. I get good accuracy, little runout, and good case life using this approach.IMO. [/QUOTE]
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Neck Sizing
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