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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension
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<blockquote data-quote="Mikecr" data-source="post: 2217811" data-attributes="member: 1521"><p>The amount I want is 1thou under cal after spring back. This ensures I have full force diametrically, and even that little will be upsized with seating for 22-26cals.</p><p>The length I usually begin with(for load development) is 1/2 seated bullet bearing.</p><p></p><p>My necks are usually at or turned to 12thou thickness, with initial process annealing and later annealing with seating forces fighting for matching. Neck friction is normalized with it's fired carbon film.</p><p>I'm sure I could press hard enough or hammer bullets in, but that's never a problem for me. My guns are single shot or converted.</p><p>Magazine capacity is not as powerful as cold bore single shot accuracy.</p><p></p><p>There is a condition where neck tension is greatly increased beyond where I go: when sizing length exceeds seated bearing (like FL sizing of necks). That pretty much automatically works for extreme pressure underbores. But for hunting capacity cartridges, I will never do this.</p><p>Nothing but bad in it.</p><p></p><p>The gain to be had with neck tension is normally with it's consistency. If you seek low variance of it, you'll head to lower tension, and develop with that. It could then lead to a faster(but case filling) powder, maybe another inch of barrel length. This, if far enough away from lands that lower tension also lowers starting pressure. But I just haven't run into any issue with it & my cartridges.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2217811, member: 1521"] The amount I want is 1thou under cal after spring back. This ensures I have full force diametrically, and even that little will be upsized with seating for 22-26cals. The length I usually begin with(for load development) is 1/2 seated bullet bearing. My necks are usually at or turned to 12thou thickness, with initial process annealing and later annealing with seating forces fighting for matching. Neck friction is normalized with it's fired carbon film. I'm sure I could press hard enough or hammer bullets in, but that's never a problem for me. My guns are single shot or converted. Magazine capacity is not as powerful as cold bore single shot accuracy. There is a condition where neck tension is greatly increased beyond where I go: when sizing length exceeds seated bearing (like FL sizing of necks). That pretty much automatically works for extreme pressure underbores. But for hunting capacity cartridges, I will never do this. Nothing but bad in it. The gain to be had with neck tension is normally with it's consistency. If you seek low variance of it, you'll head to lower tension, and develop with that. It could then lead to a faster(but case filling) powder, maybe another inch of barrel length. This, if far enough away from lands that lower tension also lowers starting pressure. But I just haven't run into any issue with it & my cartridges. [/QUOTE]
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