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Rifles, Reloading, Optics, Equipment
Reloading
Runout???
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<blockquote data-quote="Mikecr" data-source="post: 1239749" data-attributes="member: 1521"><p>You can measure thickness variance(which carries full body length) at necks, to cull out the offenders. Where you get only 5 per 10 having little variance -you see a price for cheap brass. But it can all balance out to gain if you have a plan to make your brass last.</p><p></p><p>While an expander ball contributes to runout, you won't reduce loaded runout without neck pre-expansion. This drives what thickness variance you have outward -away from seating bullets.</p><p>To pre-expand without a big hit in runout use an expander mandrel with a Sinclair or PMA expander die system. If your intent is to turn necks might as well use Sinclair or PMA neck turning systems along with this. But if your neck clearance is already high, turning will add to your sizing, and while runout is mitigated here, work hardening of necks is still there as an issue. In this case, plan to process anneal at a rate saving your brass.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1239749, member: 1521"] You can measure thickness variance(which carries full body length) at necks, to cull out the offenders. Where you get only 5 per 10 having little variance -you see a price for cheap brass. But it can all balance out to gain if you have a plan to make your brass last. While an expander ball contributes to runout, you won't reduce loaded runout without neck pre-expansion. This drives what thickness variance you have outward -away from seating bullets. To pre-expand without a big hit in runout use an expander mandrel with a Sinclair or PMA expander die system. If your intent is to turn necks might as well use Sinclair or PMA neck turning systems along with this. But if your neck clearance is already high, turning will add to your sizing, and while runout is mitigated here, work hardening of necks is still there as an issue. In this case, plan to process anneal at a rate saving your brass. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Runout???
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