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Rifles, Reloading, Optics, Equipment
Reloading
Do I need to neck turn?
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<blockquote data-quote="Bart B" data-source="post: 782605" data-attributes="member: 5302"><p>I don't think it matters how much clearance there is between a rimless bottleneck case neck and the chamber neck as long as the case neck's well centered on the case shoulder. Those with .005" clearance all the way around will center in the chamber neck just as perfect and repeatable as those with .001". Chamber and case body and neck diameters do not determine how well centered such cartridges align themselves in the chamber.</p><p></p><p>More important is how well centered the case neck is on the case shoulder. That's what determines how well centered the case neck is in the chamber neck. And a half thousandths spread in neck wall thickness doesn't seem to matter. Having shot sub 1/2 MOA 15-shot test groups with virgin brass with near .001" spread in wall thickness at 800 yards and further, I'm convinced there's other stuff more important to good accuracy.</p><p></p><p>If one has the tools to do so, measure the force needed to pull bullets across a batch of seated bullets in cases with different amounts of neck wall thickness. Most folks who have done this are quite surprised.</p></blockquote><p></p>
[QUOTE="Bart B, post: 782605, member: 5302"] I don't think it matters how much clearance there is between a rimless bottleneck case neck and the chamber neck as long as the case neck's well centered on the case shoulder. Those with .005" clearance all the way around will center in the chamber neck just as perfect and repeatable as those with .001". Chamber and case body and neck diameters do not determine how well centered such cartridges align themselves in the chamber. More important is how well centered the case neck is on the case shoulder. That's what determines how well centered the case neck is in the chamber neck. And a half thousandths spread in neck wall thickness doesn't seem to matter. Having shot sub 1/2 MOA 15-shot test groups with virgin brass with near .001" spread in wall thickness at 800 yards and further, I'm convinced there's other stuff more important to good accuracy. If one has the tools to do so, measure the force needed to pull bullets across a batch of seated bullets in cases with different amounts of neck wall thickness. Most folks who have done this are quite surprised. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Do I need to neck turn?
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