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Rifles, Reloading, Optics, Equipment
Reloading
How to Identify a Neck Donut?
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<blockquote data-quote="Mikecr" data-source="post: 1908634" data-attributes="member: 1521"><p>When you have to trim brass here & there, you have a process of donut formation in play.</p><p>That brass you're trimming away had rolled upward from lower parts of the case.</p><p>It means that with every reload cycle you're changing the entire case (a little bit,, or a lot).</p><p></p><p>There is NEVER good in excess sizing. Only bad.</p><p>2-3thou shoulder setback is excessive downsizing.</p><p>That extraction soon gets difficult means high chamber clearances near webs,, that's excessive upsizing.</p><p></p><p>Yeah, you'll need to include donut management in your sizing plan.</p><p>If you have to seat bullet bearing into neck-shoulder junction, and already have plenty of neck clearance (so don't turn necks further), and have to FL size(I don't know what your cartridge is), then consider donut reaming now & then. Just a hair, with fired/unsized necks. It's a last resort IMO, but you might be there.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1908634, member: 1521"] When you have to trim brass here & there, you have a process of donut formation in play. That brass you're trimming away had rolled upward from lower parts of the case. It means that with every reload cycle you're changing the entire case (a little bit,, or a lot). There is NEVER good in excess sizing. Only bad. 2-3thou shoulder setback is excessive downsizing. That extraction soon gets difficult means high chamber clearances near webs,, that's excessive upsizing. Yeah, you'll need to include donut management in your sizing plan. If you have to seat bullet bearing into neck-shoulder junction, and already have plenty of neck clearance (so don't turn necks further), and have to FL size(I don't know what your cartridge is), then consider donut reaming now & then. Just a hair, with fired/unsized necks. It's a last resort IMO, but you might be there. [/QUOTE]
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Reloading
How to Identify a Neck Donut?
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