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Rifles, Reloading, Optics, Equipment
Reloading
The reason we anneal brass cases.
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<blockquote data-quote="Sending156s" data-source="post: 2030451" data-attributes="member: 109060"><p>What causes the problems you have with cases is due to the brass flow that happens upon ignition/combustion followed by case deformation to fit the chamber. Annealing will never solve the problems resulting from this which is uneven brass thickness, especially in the neck immediately forward of the neck/shoulder junction & the case body above the web. This happens faster the hotter your load is (pressure). You'll develop donuts in the neck which won't be resolved by annealing.</p><p></p><p>if you inside ream necks, neck turn outside as needed annealing can help with keeping desired bullet tension which is critical for low ESs which is critical for the 1000 yd shooter. Annealing can neither stop nor prevent the damage as a result of brass flow from repeated case deformations.</p><p></p><p>For the seeker of the ultimate in LR precision the 1st steps could be a match chamber, dies created from once fired brass from that chamber that doesn't ignore the bottom .200 -.300" of the case (keep expansion down above web thus slowing flow). Annealing will help, but not as much as the match chamber with matching die set. An example might be a F-class shooter getting 50-100 reloads from their 6mm PPC.</p></blockquote><p></p>
[QUOTE="Sending156s, post: 2030451, member: 109060"] What causes the problems you have with cases is due to the brass flow that happens upon ignition/combustion followed by case deformation to fit the chamber. Annealing will never solve the problems resulting from this which is uneven brass thickness, especially in the neck immediately forward of the neck/shoulder junction & the case body above the web. This happens faster the hotter your load is (pressure). You’ll develop donuts in the neck which won’t be resolved by annealing. if you inside ream necks, neck turn outside as needed annealing can help with keeping desired bullet tension which is critical for low ESs which is critical for the 1000 yd shooter. Annealing can neither stop nor prevent the damage as a result of brass flow from repeated case deformations. For the seeker of the ultimate in LR precision the 1st steps could be a match chamber, dies created from once fired brass from that chamber that doesn’t ignore the bottom .200 -.300” of the case (keep expansion down above web thus slowing flow). Annealing will help, but not as much as the match chamber with matching die set. An example might be a F-class shooter getting 50-100 reloads from their 6mm PPC. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
The reason we anneal brass cases.
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