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Rifles, Reloading, Optics, Equipment
Reloading
Neck Tension Conundrum
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<blockquote data-quote="AZShooter" data-source="post: 782613" data-attributes="member: 5219"><p>IMO trying to press a bullet into a case with a difference much past .004" is asking for problems. The neck could be pushed out of alignment causing excessive bullet runout translating to poor accuracy. </p><p></p><p>You didn't factor neck wall thickness into your theory. Using thin (.010") or thick (.014") neck walls can change neck tension complicating the issue on how much to generate with your dies. </p><p></p><p>Best to stick with what has shown to work. If you can go with .001" or .002" difference between sized and seated diameters you will get best accuracy for single shot application. You may need more tension if the rifle is a repeater especially if it has high recoil. A crimp may be needed in some cases, the 375 H and H comes to mind. Typically RCBS full length dies create a .003" neck tension difference.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 782613, member: 5219"] IMO trying to press a bullet into a case with a difference much past .004" is asking for problems. The neck could be pushed out of alignment causing excessive bullet runout translating to poor accuracy. You didn't factor neck wall thickness into your theory. Using thin (.010") or thick (.014") neck walls can change neck tension complicating the issue on how much to generate with your dies. Best to stick with what has shown to work. If you can go with .001" or .002" difference between sized and seated diameters you will get best accuracy for single shot application. You may need more tension if the rifle is a repeater especially if it has high recoil. A crimp may be needed in some cases, the 375 H and H comes to mind. Typically RCBS full length dies create a .003" neck tension difference. [/QUOTE]
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Neck Tension Conundrum
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