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Rifles, Reloading, Optics, Equipment
Reloading
Optimal bullet seating to neck shoulder junction
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<blockquote data-quote="jrock" data-source="post: 2152437" data-attributes="member: 78569"><p>How important is it to keep the bearing surface in front of the neck shoulder junction (NSJ)? </p><p></p><p>I've read it's to prevent a doughnut from effecting neck tension. If sizing with a mandrel or expander, does that push the doughnut to the outside avoiding the issue? I could see a bushing die pushing the doughnut in but then they don't size right to the NSJ.</p><p></p><p>I'm mapping out a 7 SAUM for the 180 VLD. With the bearing surface right at the NSJ, it has an expected COAL of 2.97". I would think the bullet needs to be 20 to 30 thou up from the NSJ to avoid a doughnut. 30 thou of seating one way or the other appears to have a insignificantly change in case capacity.</p></blockquote><p></p>
[QUOTE="jrock, post: 2152437, member: 78569"] How important is it to keep the bearing surface in front of the neck shoulder junction (NSJ)? I've read it's to prevent a doughnut from effecting neck tension. If sizing with a mandrel or expander, does that push the doughnut to the outside avoiding the issue? I could see a bushing die pushing the doughnut in but then they don't size right to the NSJ. I'm mapping out a 7 SAUM for the 180 VLD. With the bearing surface right at the NSJ, it has an expected COAL of 2.97". I would think the bullet needs to be 20 to 30 thou up from the NSJ to avoid a doughnut. 30 thou of seating one way or the other appears to have a insignificantly change in case capacity. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Optimal bullet seating to neck shoulder junction
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