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Rifles, Reloading, Optics, Equipment
Reloading
28 Nosler neck turn or not?
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<blockquote data-quote="Mikecr" data-source="post: 1307234" data-attributes="member: 1521"><p>This thread is about neck turning(not trimming). If by 'factory chamber' you mean sloppy as hell, then no, there is no benefit to neck turning that couldn't be recovered otherwise.</p><p></p><p>Neck turning potentially provides for desired clearance, consistent tension, and reduced runout.</p><p>A sloppy chamber might already exceed desired clearance. Increasing this would only serve to increase sizing amount, which amplifies tension variance and runout. This, countering all gains from turning.</p><p>As an alternative, brass thickness can be measured at necks, with big disparities culled away.</p><p>Same with thickness variance, to cull away those that would generate highest runout.</p><p>You can also pre-expand necks using a mandrel die, to drive thickness variance outward -away from seating bullets. This reduces loaded runout while inconsistent in neck thickness.</p><p>If the unturned brass is so thick as to create problem neck tension, you can choose frequent process annealing to counter. This is fine as long as you had load developed with this in stable condition.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1307234, member: 1521"] This thread is about neck turning(not trimming). If by 'factory chamber' you mean sloppy as hell, then no, there is no benefit to neck turning that couldn't be recovered otherwise. Neck turning potentially provides for desired clearance, consistent tension, and reduced runout. A sloppy chamber might already exceed desired clearance. Increasing this would only serve to increase sizing amount, which amplifies tension variance and runout. This, countering all gains from turning. As an alternative, brass thickness can be measured at necks, with big disparities culled away. Same with thickness variance, to cull away those that would generate highest runout. You can also pre-expand necks using a mandrel die, to drive thickness variance outward -away from seating bullets. This reduces loaded runout while inconsistent in neck thickness. If the unturned brass is so thick as to create problem neck tension, you can choose frequent process annealing to counter. This is fine as long as you had load developed with this in stable condition. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
28 Nosler neck turn or not?
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