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Rifles, Reloading, Optics, Equipment
Reloading
neck turning
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<blockquote data-quote="AZShooter" data-source="post: 2145329" data-attributes="member: 5219"><p>There is a one thing worth mentioning about turning necks. If you are using a SAMMI spec chamber with a pretty large neck diameter you cannot turn much off of the necks or they will split upon firing or soon there after.</p><p></p><p>I know because I did exactly that with a 284 win and the Win brass many years ago. 284 Win factory brass varied quite a bit in neck thickness. I turned them down till I got a 85-90% cleanup. Back then all I had was a RCBS FL die. I was partially full length sizing. Combining the extra stretch to expand seal the chamber neck area and then sizing them well beyond bullet seating diameter and pulling a sizer ball through the neck work hardened them quickly. They didn't last very long.</p><p></p><p>IMO neck turning is done in conjunction with a tighter neck dimension in the chamber via a custom reamer. The neck wall thickness is predetermined for a particular bullet release value of .002" or even less. Then it does two things: more consistent bullet release and the brass lasts longer because it isn't being work hardened.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 2145329, member: 5219"] There is a one thing worth mentioning about turning necks. If you are using a SAMMI spec chamber with a pretty large neck diameter you cannot turn much off of the necks or they will split upon firing or soon there after. I know because I did exactly that with a 284 win and the Win brass many years ago. 284 Win factory brass varied quite a bit in neck thickness. I turned them down till I got a 85-90% cleanup. Back then all I had was a RCBS FL die. I was partially full length sizing. Combining the extra stretch to expand seal the chamber neck area and then sizing them well beyond bullet seating diameter and pulling a sizer ball through the neck work hardened them quickly. They didn't last very long. IMO neck turning is done in conjunction with a tighter neck dimension in the chamber via a custom reamer. The neck wall thickness is predetermined for a particular bullet release value of .002" or even less. Then it does two things: more consistent bullet release and the brass lasts longer because it isn't being work hardened. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
neck turning
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