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Rifles, Reloading, Optics, Equipment
Reloading
Inconsistent seating depth
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<blockquote data-quote="Mikecr" data-source="post: 1197799" data-attributes="member: 1521"><p>Donuts are merely thicker brass (than the rest of the neck) near neck-shoulder junction.</p><p>Donuts exist with all new brass, as it's inherent to case manufacture that brass thickness tapers from webs to all the way to mouths. This, anyone can measure with a good ball micrometer.</p><p>What could be considered common is donut thickness not actually interfering with anything. And if you don't size donut area, or seat bullet bearing near, it's not a problem.</p><p></p><p>Donuts can & should be mitigated by mandrel neck expansion prior to bullet seating(pre-seating), and/or with standard outside neck turning(after mandrel expansion) of NEW brass.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1197799, member: 1521"] Donuts are merely thicker brass (than the rest of the neck) near neck-shoulder junction. Donuts exist with all new brass, as it's inherent to case manufacture that brass thickness tapers from webs to all the way to mouths. This, anyone can measure with a good ball micrometer. What could be considered common is donut thickness not actually interfering with anything. And if you don't size donut area, or seat bullet bearing near, it's not a problem. Donuts can & should be mitigated by mandrel neck expansion prior to bullet seating(pre-seating), and/or with standard outside neck turning(after mandrel expansion) of NEW brass. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Inconsistent seating depth
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