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Old November 1, 2013, 07:11 PM   #21
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Join Date: December 1, 2002
Posts: 2,832
Only neck turning or reaming will 'remove' donuts but you would more likely have a case head seperation before any donut forms in normal reloading practice. Donuts are primarily a result of case reforming, specifically involving necking up to a larger bullet diameter.

Donuts don't matter anyway unless the seated bullets extend below the neck and, depending on it's thickness and your chamber's neck diameter, it may not matter then.
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