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Rifles, Reloading, Optics, Equipment
Reloading
Another mandrel post.....help
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<blockquote data-quote="Mikecr" data-source="post: 2736296" data-attributes="member: 1521"><p>Originally, mandrel use was an alternate to standard buttons provided.</p><p>Mandrels contributed less to loaded runout than buttons,, they didn't offset necks or roll brass up into donuts.</p><p>And expander mandrels (from turning systems) were more reasonable/appropriate in upsizing dimension.</p><p></p><p>Neck expansion is a pre-seating operation that biases neck spring back inward, instead of outward.</p><p>I'm sure it was well learned ~100yrs ago that neck tension would decrease over time -without expansion as a last sizing step.</p><p>Why else would would it be so consistent that any neck sizing in dies includes pre-seating expansion?</p><p>Didn't happen by chance, and I doubt there is improvement with removing of expansion. You'd just be using bullets for expanders instead of hardened mandrels.</p><p></p><p>I was actually the person who brought this to forums, and tried to convince potential in it ~30yrs ago.</p><p>It's just recently taken hold, and quickly turned into an absurd monster.</p><p>Pretty much as everything does today...</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2736296, member: 1521"] Originally, mandrel use was an alternate to standard buttons provided. Mandrels contributed less to loaded runout than buttons,, they didn't offset necks or roll brass up into donuts. And expander mandrels (from turning systems) were more reasonable/appropriate in upsizing dimension. Neck expansion is a pre-seating operation that biases neck spring back inward, instead of outward. I'm sure it was well learned ~100yrs ago that neck tension would decrease over time -without expansion as a last sizing step. Why else would would it be so consistent that any neck sizing in dies includes pre-seating expansion? Didn't happen by chance, and I doubt there is improvement with removing of expansion. You'd just be using bullets for expanders instead of hardened mandrels. I was actually the person who brought this to forums, and tried to convince potential in it ~30yrs ago. It's just recently taken hold, and quickly turned into an absurd monster. Pretty much as everything does today... [/QUOTE]
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Reloading
Another mandrel post.....help
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