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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="longestrange" data-source="post: 2027258" data-attributes="member: 75265"><p>Very well stated, thank you. What you are saying is in direct contradiction to what JE was saying - that the 375 brass is a lot weaker than the 340 brass due to web thickness. If what you say is true, necked down 375 brass is far superior to original Norma/Wby brass in terms of strength.</p><p>I also have sectioned a belted magnum case to reveal a fatal flaw. Belted cases headspace off the belt. If the neck does it's job and seals to the chamber, it also clamps the mouth of the cartridge. There is always slop in the belt to boltface distance by design, and cases stretch just ahead of the belt where it is thin until the case head touches the bolt. They definitely will thin down there until eventual failure IF the case is fully resized. Weatherby chamber/cartridge specs are tighter in this respect, so it may not be as rapid or pronounced. That being said, I never full length resize belted magnum cases after firing because they will go back into the same rifle. This results in headspacing off the neck instead of the stupid belt, eliminating the problem.</p><p>This brings up another question I had in the first post, not answered after over a page of replies, as to whether the case should be full length resized (once) after the initial fireforming or not. There may be some case taper issues down where the brass is hard, that is my worry.</p></blockquote><p></p>
[QUOTE="longestrange, post: 2027258, member: 75265"] Very well stated, thank you. What you are saying is in direct contradiction to what JE was saying - that the 375 brass is a lot weaker than the 340 brass due to web thickness. If what you say is true, necked down 375 brass is far superior to original Norma/Wby brass in terms of strength. I also have sectioned a belted magnum case to reveal a fatal flaw. Belted cases headspace off the belt. If the neck does it's job and seals to the chamber, it also clamps the mouth of the cartridge. There is always slop in the belt to boltface distance by design, and cases stretch just ahead of the belt where it is thin until the case head touches the bolt. They definitely will thin down there until eventual failure IF the case is fully resized. Weatherby chamber/cartridge specs are tighter in this respect, so it may not be as rapid or pronounced. That being said, I never full length resize belted magnum cases after firing because they will go back into the same rifle. This results in headspacing off the neck instead of the stupid belt, eliminating the problem. This brings up another question I had in the first post, not answered after over a page of replies, as to whether the case should be full length resized (once) after the initial fireforming or not. There may be some case taper issues down where the brass is hard, that is my worry. [/QUOTE]
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.375 H&H Brass to .340 Weatherby Brass Conversion Question
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