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Long Range Hunting & Shooting
Belted magnum collet die?
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<blockquote data-quote="MagnumManiac" data-source="post: 1434409" data-attributes="member: 10755"><p>Your statement here is completely false. No FL die is going to bump your shoulder back .021". PERIOD.</p><p>Belted magnums headspace on the belt, brass manufacturers keep this dimension pretty tight in most instances .220" +/- .010", BUT, when it comes to shoulder position they are slack in this area as it is not critical to keep it tight. The reason a belted case doesn't separate on the first firing is due to the belt, not the distance to the shoulder.</p><p>The die has the same dimensions as the chamber minus .002"-.007", so your die can ONLY size your SHOULDER TO HEAD dimension by a maximum of .002" beyond SAAMI MINIMUM.</p><p>BTW, the headspace dimension on a belted cartridge CANNOT be changed by sizing the brass, the belt datum does not change during firing or sizing, you are only imparting CLEARANCE from HEAD TO SHOULDER by bumping/sizing the shoulder.</p><p></p><p>I have never had bulged cases, as Larry Willis class it, in over a dozen belted magnum rifles I load for.</p><p>I know it exists, but loading technique, chamber design and brass choice can ALL contribute to the problem.</p><p>Just to let you know, Weatherby/Norma brass appears to make the problem worse as it has thin webs.</p><p></p><p>Cheers.</p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1434409, member: 10755"] Your statement here is completely false. No FL die is going to bump your shoulder back .021”. PERIOD. Belted magnums headspace on the belt, brass manufacturers keep this dimension pretty tight in most instances .220” +/- .010”, BUT, when it comes to shoulder position they are slack in this area as it is not critical to keep it tight. The reason a belted case doesn’t separate on the first firing is due to the belt, not the distance to the shoulder. The die has the same dimensions as the chamber minus .002”-.007”, so your die can ONLY size your SHOULDER TO HEAD dimension by a maximum of .002” beyond SAAMI MINIMUM. BTW, the headspace dimension on a belted cartridge CANNOT be changed by sizing the brass, the belt datum does not change during firing or sizing, you are only imparting CLEARANCE from HEAD TO SHOULDER by bumping/sizing the shoulder. I have never had bulged cases, as Larry Willis class it, in over a dozen belted magnum rifles I load for. I know it exists, but loading technique, chamber design and brass choice can ALL contribute to the problem. Just to let you know, Weatherby/Norma brass appears to make the problem worse as it has thin webs. Cheers. :) [/QUOTE]
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Belted magnum collet die?
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