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Rifles, Reloading, Optics, Equipment
Reloading
the dredid doughnut
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<blockquote data-quote="gte901m" data-source="post: 1326432" data-attributes="member: 80740"><p>As others have mentioned, its not a problem if the bullet is not seated into the donut.</p><p></p><p>However, you will have a problem if you ever decide to full length size and pull an expander through (everyone just gasped...a full length die with an expander)</p><p></p><p>I have found through testing that donuts are one of the primary contributors to concentricity issues with full length sizing with an expander. I have been able to maintain <0.003" bullet concentricity while full length sizing if I inside neck ream with a Wilson neck reamer after firing. I speculate the thickness of donuts are not symmetrical, which encourages the expander to pull off center.</p><p></p><p>From using pin gauges to measure fired brass necks, I have found that donuts form in almost all the bottleneck cartridges I load when neck sizing.</p><p></p><p>I'm not advocating FL sizing with an expander, but thought I would mention it in the event you need to push the shoulder back after repeated firings and all you had was a FL die. A redding body die compliments neck sizing well.</p></blockquote><p></p>
[QUOTE="gte901m, post: 1326432, member: 80740"] As others have mentioned, its not a problem if the bullet is not seated into the donut. However, you will have a problem if you ever decide to full length size and pull an expander through (everyone just gasped...a full length die with an expander) I have found through testing that donuts are one of the primary contributors to concentricity issues with full length sizing with an expander. I have been able to maintain <0.003" bullet concentricity while full length sizing if I inside neck ream with a Wilson neck reamer after firing. I speculate the thickness of donuts are not symmetrical, which encourages the expander to pull off center. From using pin gauges to measure fired brass necks, I have found that donuts form in almost all the bottleneck cartridges I load when neck sizing. I'm not advocating FL sizing with an expander, but thought I would mention it in the event you need to push the shoulder back after repeated firings and all you had was a FL die. A redding body die compliments neck sizing well. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
the dredid doughnut
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