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Rifles, Reloading, Optics, Equipment
Reloading
Thoughts on neck turning
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<blockquote data-quote="MagnumManiac" data-source="post: 2159415" data-attributes="member: 10755"><p>Unless the rifle in question is an absolute tack driver with fully prepped brass ie, weight/volume sorted, flash holes deburred, necks have been mandreled etc, then the answer is yes to clean up the neck diameter to give uniform neck tension.</p><p>If the answer is a hunting rifle off the shelf that shoots well, say 1/2" or a little more, then neck turning is unlikely to make a difference or shrink groups. If it's the above and shoots 1/4" then it MAY shrink groups, but nothing is written in stone.</p><p>I only skim turn these days and do not use tight neck chambers, as thinning necks less than .0125" thickness causes LESS neck tension in my experience and I run .004"</p><p>clearance in my chamber necks on my reamers.</p><p>I don't even turn the entire neck length either, about 80-90% is sufficient with most case designs. However, with the 264WM and 300WM I turn to about .010" from the shoulder juncture as they have short necks which I do not trim back to the SAAMI trim to length, I allow them to grow to within .005" from the end of the chamber and trim back .005".</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2159415, member: 10755"] Unless the rifle in question is an absolute tack driver with fully prepped brass ie, weight/volume sorted, flash holes deburred, necks have been mandreled etc, then the answer is yes to clean up the neck diameter to give uniform neck tension. If the answer is a hunting rifle off the shelf that shoots well, say 1/2” or a little more, then neck turning is unlikely to make a difference or shrink groups. If it’s the above and shoots 1/4” then it MAY shrink groups, but nothing is written in stone. I only skim turn these days and do not use tight neck chambers, as thinning necks less than .0125” thickness causes LESS neck tension in my experience and I run .004” clearance in my chamber necks on my reamers. I don’t even turn the entire neck length either, about 80-90% is sufficient with most case designs. However, with the 264WM and 300WM I turn to about .010” from the shoulder juncture as they have short necks which I do not trim back to the SAAMI trim to length, I allow them to grow to within .005” from the end of the chamber and trim back .005”. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Thoughts on neck turning
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