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Rifles, Reloading, Optics, Equipment
Reloading
Neck turned too much?
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<blockquote data-quote="AZShooter" data-source="post: 817191" data-attributes="member: 5219"><p>They are not ruined. But you may have a shorter brass life depending on your chamber dimensions. Many of us have turned brass down far more than that! I have a 30 BR that I turn down to .0105". </p><p></p><p></p><p>The issue isn't the amount of brass turned off but the dimension of the chamber neck vs the OD of a loaded round. There must be some space for bullet release. In some cases the reamer was made with a custom tight neck which required turning. The idea is to have consistent neck tension for bullet release and to conform to chamber as concentrically as possible. The previously mentioned 30 BR has a bullet release clearance of .001" per side. </p><p></p><p> Typically a factory chambering has a great deal of release clearance, IMO too much. If the brass gets turned then there is more expansion of the neck to seal chamber upon firing. This can over work the brass and cause premature cracking. I know all about it, I turned some 284 brass back when I started neck turning and it only lasted two firings. I realized that turning was not going to do great things in that sloppy necked sammi spec chamber. </p><p></p><p>You could segregate the "overturned" brass for practice or a comparison to your regular turned brass. See if the brass lasts or has to be retired early due to cracking. </p><p></p><p>Hope this helps</p></blockquote><p></p>
[QUOTE="AZShooter, post: 817191, member: 5219"] They are not ruined. But you may have a shorter brass life depending on your chamber dimensions. Many of us have turned brass down far more than that! I have a 30 BR that I turn down to .0105". The issue isn't the amount of brass turned off but the dimension of the chamber neck vs the OD of a loaded round. There must be some space for bullet release. In some cases the reamer was made with a custom tight neck which required turning. The idea is to have consistent neck tension for bullet release and to conform to chamber as concentrically as possible. The previously mentioned 30 BR has a bullet release clearance of .001" per side. Typically a factory chambering has a great deal of release clearance, IMO too much. If the brass gets turned then there is more expansion of the neck to seal chamber upon firing. This can over work the brass and cause premature cracking. I know all about it, I turned some 284 brass back when I started neck turning and it only lasted two firings. I realized that turning was not going to do great things in that sloppy necked sammi spec chamber. You could segregate the "overturned" brass for practice or a comparison to your regular turned brass. See if the brass lasts or has to be retired early due to cracking. Hope this helps [/QUOTE]
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Neck turned too much?
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