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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pros/Cons of 30 vs 40 degree shoulder?
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<blockquote data-quote="Hugnot" data-source="post: 2583406" data-attributes="member: 115658"><p>One of my favorite rounds is the 6mm AI with a 40 degree shoulder and next to no body taper. I fireform either 6mm Rem or 7X57 cases necked down to 6mm. Feeding is real slick thru a LA Ruger M77 MKII, velocites 125-150 fps more than 6mm Rem. It uses about 99% case capacity with 87 grain VMax bullets loaded with VN1165 or RL23. Boosting case capacity & the sharper shoulder seem to work with slower powders & 87 grain bullets.</p><p></p><p>Case trimming is less. </p><p></p><p>I have read and expect it to be true that upon making cases with shoulders like 40 degree an unacceptable number of cases have folds in the shoulder area. This causes waste and reduced $ gain, so it appears that 30 degree or so shoulders are made instead.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2583406, member: 115658"] One of my favorite rounds is the 6mm AI with a 40 degree shoulder and next to no body taper. I fireform either 6mm Rem or 7X57 cases necked down to 6mm. Feeding is real slick thru a LA Ruger M77 MKII, velocites 125-150 fps more than 6mm Rem. It uses about 99% case capacity with 87 grain VMax bullets loaded with VN1165 or RL23. Boosting case capacity & the sharper shoulder seem to work with slower powders & 87 grain bullets. Case trimming is less. I have read and expect it to be true that upon making cases with shoulders like 40 degree an unacceptable number of cases have folds in the shoulder area. This causes waste and reduced $ gain, so it appears that 30 degree or so shoulders are made instead. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pros/Cons of 30 vs 40 degree shoulder?
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