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Rifles, Reloading, Optics, Equipment
Reloading
Headspace Datum Line?
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<blockquote data-quote="boomtube" data-source="post: 702385" data-attributes="member: 9215"><p><em>"I measure ALL of them and line them up in files, <u>then whichever file has the most cases</u> I base my shoulder setback on those."</em></p><p> </p><p>I'd suggest you not do it that way, it ignores the fact that not all cases springback the same so you'll end up with those cases that are harder won't be sized quite enough. With a bolt rifle it will probably "work" but I believe it's better to use the longest fired case length, not the average, as a goal for resizing. Done that way we only need to restore the shoulders to match the longest fired length without any 'set back' at all; they are a tad shorter than chamber length anyway.</p></blockquote><p></p>
[QUOTE="boomtube, post: 702385, member: 9215"] [I]"I measure ALL of them and line them up in files, [U]then whichever file has the most cases[/U] I base my shoulder setback on those."[/I] I'd suggest you not do it that way, it ignores the fact that not all cases springback the same so you'll end up with those cases that are harder won't be sized quite enough. With a bolt rifle it will probably "work" but I believe it's better to use the longest fired case length, not the average, as a goal for resizing. Done that way we only need to restore the shoulders to match the longest fired length without any 'set back' at all; they are a tad shorter than chamber length anyway. [/QUOTE]
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Reloading
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