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Rifles, Reloading, Optics, Equipment
Reloading
Concentricity:How much ?
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<blockquote data-quote="Moman" data-source="post: 360138" data-attributes="member: 10494"><p>+1 on this technique. I FL size with custom honed Forster FL Comp dies with an expander. After sizing, I measure runout at the case mouth along with neck wall variance and make sure they match. As long as they match, I figure any runout shown will be due to neck wall variance and the centers should be true. I don't neck turn so this is the best I can do at this stage. I sort brass by neck wall variance and only keep .001 or better for long range work. This has helped with much better TIR and long range accuracy. </p><p> </p><p>As far as the magic number, I am striving for 0 runout but usually end up with .001. Lately I've had some problems with runout that I associate with poor brass and a tweaked press. This has absolutely killed accuracy. Some loads jumped up to .006-.011 and accuracy opened way up in the 1" range. A little embarrasing that this snuck by me, but life is life and corrections are being made.</p><p> </p><p>As 300RUM mentioned, paying attention to all details is critical.</p></blockquote><p></p>
[QUOTE="Moman, post: 360138, member: 10494"] +1 on this technique. I FL size with custom honed Forster FL Comp dies with an expander. After sizing, I measure runout at the case mouth along with neck wall variance and make sure they match. As long as they match, I figure any runout shown will be due to neck wall variance and the centers should be true. I don't neck turn so this is the best I can do at this stage. I sort brass by neck wall variance and only keep .001 or better for long range work. This has helped with much better TIR and long range accuracy. As far as the magic number, I am striving for 0 runout but usually end up with .001. Lately I've had some problems with runout that I associate with poor brass and a tweaked press. This has absolutely killed accuracy. Some loads jumped up to .006-.011 and accuracy opened way up in the 1" range. A little embarrasing that this snuck by me, but life is life and corrections are being made. As 300RUM mentioned, paying attention to all details is critical. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Concentricity:How much ?
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