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Rifles, Reloading, Optics, Equipment
Reloading
need help with 7mm belted cases
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<blockquote data-quote="J E Custom" data-source="post: 535356" data-attributes="member: 2736"><p>What I call the donut is the last part of the neck against the shoulder that has "Not" been sized</p><p>and remains the size of the neck chamber after fire forming.</p><p></p><p>In other words If the neck is .300 thousandths long you would size only .280 to .290 and leave </p><p>10 to 20 thousandths UN sized . </p><p></p><p>What this does is to assure that the neck is centered to the bore after sizing when chambered.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 535356, member: 2736"] What I call the donut is the last part of the neck against the shoulder that has "Not" been sized and remains the size of the neck chamber after fire forming. In other words If the neck is .300 thousandths long you would size only .280 to .290 and leave 10 to 20 thousandths UN sized . What this does is to assure that the neck is centered to the bore after sizing when chambered. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
need help with 7mm belted cases
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