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Rifles, Reloading, Optics, Equipment
Reloading
Need Advice on Concentricity Problem
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<blockquote data-quote="AZShooter" data-source="post: 932224" data-attributes="member: 5219"><p>Just read the entire thread. Nothing was mentioned about neck tension. </p><p></p><p>What is the difference in neck OD of sized vs seated? Most RCBS FL sizers I have used will make a .003" difference. If it is .003" or more it may be too much tension when combined with the steep 40 degree shoulder. The seating pressure could cause the shoulder to yield causing your excessive runout. </p><p></p><p>When you get your bushing die try using bushings that create .003" and .002" neck tension and see if less neck tension helps reduce runout values.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 932224, member: 5219"] Just read the entire thread. Nothing was mentioned about neck tension. What is the difference in neck OD of sized vs seated? Most RCBS FL sizers I have used will make a .003" difference. If it is .003" or more it may be too much tension when combined with the steep 40 degree shoulder. The seating pressure could cause the shoulder to yield causing your excessive runout. When you get your bushing die try using bushings that create .003" and .002" neck tension and see if less neck tension helps reduce runout values. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Need Advice on Concentricity Problem
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