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Rifles, Reloading, Optics, Equipment
Reloading
Best Neck Turning Tool
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<blockquote data-quote="Mikecr" data-source="post: 433478" data-attributes="member: 1521"><p>Reasons we turn necks aside, the actual operation get's a whole lot simpler when you accept that it is only producing desired thickness. That's it.</p><p>Everything else, including thinkings of the left handed,, are beyond proper neck turning. </p><p></p><p>The purpose of mandrel expansion is twofold(atleast). It pushes thickness variance outward, including any doughnut, for you to cut. And it leaves the neck ID a close enough fit to ensure brass is fully supported between the mandrel and cutter, without overheating/expansion during the cut. </p><p>The Sinclair mandrels are sized so that they can be used to push any remaining thickness variance outward during reloading -just prior to bullet seating. This aids in straighter seating. I also use this system to measure and adjust seating force, before bullet seatings(with a loadcell in Sinclair's die).</p><p></p><p>And I might as well go here; Bullet seating is also not to 'straighten' cartridges. </p><p>It's too late by then as your cartridges are either straight or they aren't..</p><p>When you bring loaded cartridge runout into neck turning, or seating, you're really heading away from these individual operations, while generalizing about their actual contributions to runout.</p><p>Truly, you can turn and seat perfectly and still produce horribly crooked ammo...</p><p>It's another subject altogether</p></blockquote><p></p>
[QUOTE="Mikecr, post: 433478, member: 1521"] Reasons we turn necks aside, the actual operation get's a whole lot simpler when you accept that it is only producing desired thickness. That's it. Everything else, including thinkings of the left handed,, are beyond proper neck turning. The purpose of mandrel expansion is twofold(atleast). It pushes thickness variance outward, including any doughnut, for you to cut. And it leaves the neck ID a close enough fit to ensure brass is fully supported between the mandrel and cutter, without overheating/expansion during the cut. The Sinclair mandrels are sized so that they can be used to push any remaining thickness variance outward during reloading -just prior to bullet seating. This aids in straighter seating. I also use this system to measure and adjust seating force, before bullet seatings(with a loadcell in Sinclair's die). And I might as well go here; Bullet seating is also not to 'straighten' cartridges. It's too late by then as your cartridges are either straight or they aren't.. When you bring loaded cartridge runout into neck turning, or seating, you're really heading away from these individual operations, while generalizing about their actual contributions to runout. Truly, you can turn and seat perfectly and still produce horribly crooked ammo... It's another subject altogether [/QUOTE]
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Best Neck Turning Tool
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