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Rifles, Reloading, Optics, Equipment
Reloading
Headspace with full length resizing
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<blockquote data-quote="boomtube" data-source="post: 617031" data-attributes="member: 9215"><p><em>"What would cause the shoulder not not set back the exact same each time and anyone else have trouble with this?"</em></p><p> </p><p>They will never be 'exactly' the same for more than a few cases. Nor does it really matter with a factory rifle so long as the longest resized shoulder length doesn't exceed the longest fired lenght; that will insure the cartridges will all chamber smoothly and that's about as good as it gets. Only dead soft, totally over heated during annealing, cases will be totally mallible during firing and resizing.</p><p> </p><p>The reason you see shoulder length (and diameter) variation is that the hardness/springback of cases does vary. It varies a little in the same new box and that hardness/springback increases each time you cycle them. The hardness variation acccounts for about half of the springing variation you're getting, the other half comes from your inconsistant lubing and final pressure and varying rythum when operating the press.</p></blockquote><p></p>
[QUOTE="boomtube, post: 617031, member: 9215"] [I]"What would cause the shoulder not not set back the exact same each time and anyone else have trouble with this?"[/I] They will never be 'exactly' the same for more than a few cases. Nor does it really matter with a factory rifle so long as the longest resized shoulder length doesn't exceed the longest fired lenght; that will insure the cartridges will all chamber smoothly and that's about as good as it gets. Only dead soft, totally over heated during annealing, cases will be totally mallible during firing and resizing. The reason you see shoulder length (and diameter) variation is that the hardness/springback of cases does vary. It varies a little in the same new box and that hardness/springback increases each time you cycle them. The hardness variation acccounts for about half of the springing variation you're getting, the other half comes from your inconsistant lubing and final pressure and varying rythum when operating the press. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Headspace with full length resizing
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