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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The PRC die "problem"
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<blockquote data-quote="P7M13" data-source="post: 2027300" data-attributes="member: 94154"><p>[USER=101859]@Alex Wheeler[/USER] , thanks for starting this thread, very informative.</p><p>I've not encountered this problem because I don't push my loading levels to the extreme.</p><p>That said, I have observed very different "spring back" between brass brands, and I'm just talking about shoulder and neck. Have also observed dies that are "out of round", confirmed by rolling a case on my tooling block.</p><p></p><p>I wouldn't blame it on the manufacturer. Many people here push the limits of their rifles, and messieurs Sherman and Wheeler specifically cater to that group. When you're at that level, and your rifle costs north of $5K, custom dies to your sepecification are in order.</p><p>I believe there are many sources of information on *how* to specify dies for your chamber.</p><p></p><p>I used to design precision machinery for stamping and roll forming. The parts are not often thought of as "precision" but when your part has to conform to a variance of +/- 0.0015" after cutoff (a flying cutoff, no less), you gain an appreciation for "spring back" and your cutoff clamps look like a very distorted version of the final product shape.</p><p>Change the composition of the steel, and you start all over again.... </p><p></p><p>Same goes for brass in cartridges.</p></blockquote><p></p>
[QUOTE="P7M13, post: 2027300, member: 94154"] [USER=101859]@Alex Wheeler[/USER] , thanks for starting this thread, very informative. I've not encountered this problem because I don't push my loading levels to the extreme. That said, I have observed very different "spring back" between brass brands, and I'm just talking about shoulder and neck. Have also observed dies that are "out of round", confirmed by rolling a case on my tooling block. I wouldn't blame it on the manufacturer. Many people here push the limits of their rifles, and messieurs Sherman and Wheeler specifically cater to that group. When you're at that level, and your rifle costs north of $5K, custom dies to your sepecification are in order. I believe there are many sources of information on *how* to specify dies for your chamber. I used to design precision machinery for stamping and roll forming. The parts are not often thought of as "precision" but when your part has to conform to a variance of +/- 0.0015" after cutoff (a flying cutoff, no less), you gain an appreciation for "spring back" and your cutoff clamps look like a very distorted version of the final product shape. Change the composition of the steel, and you start all over again.... Same goes for brass in cartridges. [/QUOTE]
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The PRC die "problem"
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