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Rifles, Reloading, Optics, Equipment
Reloading
How does the RCBS X-die work? Extend case life?
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<blockquote data-quote="boomtube" data-source="post: 353663" data-attributes="member: 9215"><p>"I've adjusted the RCBS full length sizing die (not an X-die) to bump the shoulders only .002" near as I can measure."</p><p> </p><p>Case stretching and eventual head seperation comes from the body wall just above the web, as you noted. The X die can do nothing, of itself, to control that.</p><p> </p><p>The X die works it's magic with a decapper stem that has a dual diameter rod with a square shoulder transition. The larger diameter upper part is adjusted with the step making firm contact against the case mouth and serves to push any lengthening back into the case shoulder. That obviously eliminates the need for trimming but it does nothing to stop case wall stretching or extend case life. </p><p> </p><p>I believe you need to reduce the shoulder bump. I adjust my FL sizers, including .22-250 and -06, to duplicate the fired and resized shoulder location and my cases last a long time. A case is expanded and stretched when fired but then springs back for easy extraction; that includes the shoulder location. By setting your's back even further each cycle you only insure addtitonal stretching and it likely has little effect on chambering effort.</p></blockquote><p></p>
[QUOTE="boomtube, post: 353663, member: 9215"] "I've adjusted the RCBS full length sizing die (not an X-die) to bump the shoulders only .002" near as I can measure." Case stretching and eventual head seperation comes from the body wall just above the web, as you noted. The X die can do nothing, of itself, to control that. The X die works it's magic with a decapper stem that has a dual diameter rod with a square shoulder transition. The larger diameter upper part is adjusted with the step making firm contact against the case mouth and serves to push any lengthening back into the case shoulder. That obviously eliminates the need for trimming but it does nothing to stop case wall stretching or extend case life. I believe you need to reduce the shoulder bump. I adjust my FL sizers, including .22-250 and -06, to duplicate the fired and resized shoulder location and my cases last a long time. A case is expanded and stretched when fired but then springs back for easy extraction; that includes the shoulder location. By setting your's back even further each cycle you only insure addtitonal stretching and it likely has little effect on chambering effort. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How does the RCBS X-die work? Extend case life?
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