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Rifles, Reloading, Optics, Equipment
Reloading
156 Berger Jump
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<blockquote data-quote="QuietTexan" data-source="post: 2462171" data-attributes="member: 116181"><p>My thoughts on the issue are if you bump too far, in addition to increasing tolerances you're risking thinning out the lower case walls above the web:</p><p>[URL unfurl="true"]http://bulletin.accurateshooter.com/2021/03/incipient-case-head-separation-how-to-detect-the-problem/[/URL]</p><p></p><p>This point is somewhat implicit in Vance's post - with the 6.5 PRC the problem is needing to size the datum line on the base down (due to the chamber tolerance being too tight in the design), and to get this particular Hornady die low enough to do that the result is the shoulders moving .004-.005. It's a dimension problem in the die (in that the die doesn't size the datum line small enough until the shoulders are too low) so you're trading a current problem for a potential new problem. </p><p></p><p></p><p>The solutions I would pursue are either a better die that sizes the datum line with less shoulder bump, or the AW2 reamer to fix the chamber dimension issue that gives rise the die needing to size more. That doesn't mean "maybe have to buy brass more often" as the cost of oversizing the case isn't a viable solution also, just not the one I would want.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2462171, member: 116181"] My thoughts on the issue are if you bump too far, in addition to increasing tolerances you're risking thinning out the lower case walls above the web: [URL unfurl="true"]http://bulletin.accurateshooter.com/2021/03/incipient-case-head-separation-how-to-detect-the-problem/[/URL] This point is somewhat implicit in Vance's post - with the 6.5 PRC the problem is needing to size the datum line on the base down (due to the chamber tolerance being too tight in the design), and to get this particular Hornady die low enough to do that the result is the shoulders moving .004-.005. It's a dimension problem in the die (in that the die doesn't size the datum line small enough until the shoulders are too low) so you're trading a current problem for a potential new problem. The solutions I would pursue are either a better die that sizes the datum line with less shoulder bump, or the AW2 reamer to fix the chamber dimension issue that gives rise the die needing to size more. That doesn't mean "maybe have to buy brass more often" as the cost of oversizing the case isn't a viable solution also, just not the one I would want. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
156 Berger Jump
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