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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension confused on what I need to get???
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<blockquote data-quote="Mikecr" data-source="post: 1104711" data-attributes="member: 1521"><p>This at least sounds wrong.</p><p>Donuts amount to thicker brass near case shoulders than at mouths. They're inherent to case manufacture to begin. They're created further with necking up of brass, which makes thicker shoulder brass part of the new neck. They're created further with heavy body sizing, which moves brass thick toward thin(up the case), where you eventually trim it away at case mouths. If you have to trim here & there, you're moving brass up into necks.</p><p></p><p>Sizing necks down does not cause donuts, but leaves existing thicker brass into play(as implied). But this is why most neck size systems include expansion. That is, pre-expansion before bullet seating. All bushing neck dies include expansion, and you should use this, or better, Sinclair's neck expander mandrels.</p><p></p><p>There is nothing 'wrong' with the collet system. But with it you lose the ability to swap bushings and dial in your tension with both downsizing amount and length.</p><p>Believe me, if the collet system was actually better than bushings I would be using it.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1104711, member: 1521"] This at least sounds wrong. Donuts amount to thicker brass near case shoulders than at mouths. They're inherent to case manufacture to begin. They're created further with necking up of brass, which makes thicker shoulder brass part of the new neck. They're created further with heavy body sizing, which moves brass thick toward thin(up the case), where you eventually trim it away at case mouths. If you have to trim here & there, you're moving brass up into necks. Sizing necks down does not cause donuts, but leaves existing thicker brass into play(as implied). But this is why most neck size systems include expansion. That is, pre-expansion before bullet seating. All bushing neck dies include expansion, and you should use this, or better, Sinclair's neck expander mandrels. There is nothing 'wrong' with the collet system. But with it you lose the ability to swap bushings and dial in your tension with both downsizing amount and length. Believe me, if the collet system was actually better than bushings I would be using it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck tension confused on what I need to get???
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