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Rifles, Reloading, Optics, Equipment
Reloading
Need help with consistent seating depth using seating die
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<blockquote data-quote="GLTaylor" data-source="post: 2020741" data-attributes="member: 111593"><p>Epoletna,</p><p>Donuts are a ring of excess brass that forms at the base of the neck at the shoulder junction. They most commonly occur after sizing brass down when modifying brass - say from 30 cal down to 264. The excess brass has to go somewhere. A ring (donut) forms at the neck base and constricts the base of the neck such that a bullet can't be fully seated past the neck base - or if seated, done so with Way more pressure.</p><p>There are two cures. One is turning your case necks and running the cutter down to just touch the shoulder. Size your brass normally, then tun an expander mandrel into the neck to push excess brass to the outside before turning.</p><p>The other method is to size the brass and run a cutter down the inside of the neck to remove the donut from the inside. Use a caliber specific cutter for this. Personally, I prefer the outside neck turning method. Only has to be done once either way. Regards.</p></blockquote><p></p>
[QUOTE="GLTaylor, post: 2020741, member: 111593"] Epoletna, Donuts are a ring of excess brass that forms at the base of the neck at the shoulder junction. They most commonly occur after sizing brass down when modifying brass - say from 30 cal down to 264. The excess brass has to go somewhere. A ring (donut) forms at the neck base and constricts the base of the neck such that a bullet can't be fully seated past the neck base - or if seated, done so with Way more pressure. There are two cures. One is turning your case necks and running the cutter down to just touch the shoulder. Size your brass normally, then tun an expander mandrel into the neck to push excess brass to the outside before turning. The other method is to size the brass and run a cutter down the inside of the neck to remove the donut from the inside. Use a caliber specific cutter for this. Personally, I prefer the outside neck turning method. Only has to be done once either way. Regards. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Need help with consistent seating depth using seating die
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