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Rifles, Reloading, Optics, Equipment
Reloading
.280 AI controversy explained ...
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<blockquote data-quote="woods" data-source="post: 834768" data-attributes="member: 6042"><p>Pressure is very seldom the cause of flattened primers. When the case is fired it moves forward in the chamber until it is stopped (distance determined by headspace), the primer backs out and to the bolt face, the case expands backwards to the bolt face. The primer is being squeezed between the bolt face and the pressure from the expanding gas of powder burning coming through the primer hole. </p><p></p><p>The edges of the primer that are not supported within the primer pocket by the case head will be flattened.</p><p></p><p>My flattened primers were not because of pressure. It was a known load that was not causing problems with loose primer pockets, shiny spots on case head or hard bolt lift. Velocity was as expected.</p></blockquote><p></p>
[QUOTE="woods, post: 834768, member: 6042"] Pressure is very seldom the cause of flattened primers. When the case is fired it moves forward in the chamber until it is stopped (distance determined by headspace), the primer backs out and to the bolt face, the case expands backwards to the bolt face. The primer is being squeezed between the bolt face and the pressure from the expanding gas of powder burning coming through the primer hole. The edges of the primer that are not supported within the primer pocket by the case head will be flattened. My flattened primers were not because of pressure. It was a known load that was not causing problems with loose primer pockets, shiny spots on case head or hard bolt lift. Velocity was as expected. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.280 AI controversy explained ...
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