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Rifles, Reloading, Optics, Equipment
Reloading
.375 H&H Brass to .340 Weatherby Brass Conversion Question
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<blockquote data-quote="MagnumManiac" data-source="post: 2027269" data-attributes="member: 10755"><p>I do not FL size any of my brass, I partial FL size so that the shoulder is bumped .002"-.003" and the case head spaces off the shoulder and not the belt.</p><p>You need to look at the belt as a fire forming tool only, once that is done the shoulder takes over from there.</p><p>This interweb notion about expansion above the belt and thinning there on the first firing is a myth. The case will only thin there if the shoulder is bumped back too much, say in the order of .005"-.008" each time it is fired.</p><p>Once you fire form the brass, I would adjust a FL die so that only a partial neck reduction takes place, say 3/4 of the necks length, Weatherby's have long necks so there will be ample bullet grip.</p><p>After that second firing I would be bumping the shoulder .002"-.003" max and be done.</p><p>The cases will need that second full power load to fully form to the chamber.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2027269, member: 10755"] I do not FL size any of my brass, I partial FL size so that the shoulder is bumped .002”-.003” and the case head spaces off the shoulder and not the belt. You need to look at the belt as a fire forming tool only, once that is done the shoulder takes over from there. This interweb notion about expansion above the belt and thinning there on the first firing is a myth. The case will only thin there if the shoulder is bumped back too much, say in the order of .005”-.008” each time it is fired. Once you fire form the brass, I would adjust a FL die so that only a partial neck reduction takes place, say 3/4 of the necks length, Weatherby’s have long necks so there will be ample bullet grip. After that second firing I would be bumping the shoulder .002”-.003” max and be done. The cases will need that second full power load to fully form to the chamber. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.375 H&H Brass to .340 Weatherby Brass Conversion Question
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