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Rifles, Reloading, Optics, Equipment
Reloading
Resizing: case life and accuracy???
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<blockquote data-quote="Kevin Thomas" data-source="post: 490520" data-attributes="member: 15748"><p>Dgutter,</p><p> </p><p>The case neck splits aren't a result of full length sizing, and going to neck sizing with the same neck dimensions in dies and expanders wouldn't solve that one. You're overworking your necks, and that's what causes them to split. Overworking your brass by pushing the shoulder back too far during full length sizing will cause head separations if it's done too often or too severely, but that's another issue entirely.</p><p> </p><p>You might want to take a look at Forster or Redding bushing dies. This may solve the problem, assuming you select a bushing the sizes the necks just enough to provide the tension you're after, and no more. As it is right now, I'd hazard a guess that your die is sizing the neck down far tighter than it needs to be, and then opening it back up with an expander ball that's overworking the necks. The correct bushing size will take the necks down, while providing virtually no resistance to the expander ball <u>if</u> you even choose to continue using it. Don't have to, and many simply dispense with the expander altogether. Assuming the chamber neck isn't too large, and allows the necks to expand too badly upon firing, this should extend your case life considerably. Personally, I'd recommend that you continue to F/L size, but that's a personal choice. It prevents a number of problems, and so long as you're using a gage and not bumping the shoulders back more than .001"-.002" at most, your case life should still be very good. Hope that helps.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 490520, member: 15748"] Dgutter, The case neck splits aren't a result of full length sizing, and going to neck sizing with the same neck dimensions in dies and expanders wouldn't solve that one. You're overworking your necks, and that's what causes them to split. Overworking your brass by pushing the shoulder back too far during full length sizing will cause head separations if it's done too often or too severely, but that's another issue entirely. You might want to take a look at Forster or Redding bushing dies. This may solve the problem, assuming you select a bushing the sizes the necks just enough to provide the tension you're after, and no more. As it is right now, I'd hazard a guess that your die is sizing the neck down far tighter than it needs to be, and then opening it back up with an expander ball that's overworking the necks. The correct bushing size will take the necks down, while providing virtually no resistance to the expander ball [U]if[/U] you even choose to continue using it. Don't have to, and many simply dispense with the expander altogether. Assuming the chamber neck isn't too large, and allows the necks to expand too badly upon firing, this should extend your case life considerably. Personally, I'd recommend that you continue to F/L size, but that's a personal choice. It prevents a number of problems, and so long as you're using a gage and not bumping the shoulders back more than .001"-.002" at most, your case life should still be very good. Hope that helps. [/QUOTE]
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Resizing: case life and accuracy???
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