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Rifles, Reloading, Optics, Equipment
Reloading
Sherman Wildcats pressure limits?
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<blockquote data-quote="MagnumManiac" data-source="post: 1534475" data-attributes="member: 10755"><p>I run several Improved cartridges, both AI, and non AI Improved with 45 degree shoulders. I also run a 375 Weatherby that I need to fire form then run semi tested loads in.</p><p>I find that brass is brass, if you exceed safe pressures, you get cratered primers, ejector marks, loose primer pockets and other embossing on the case head.</p><p>My 375 Weatherby shows cratered primers, along with flattened primers, as soon as pressure exceeds max. The next step is always ejector marks and loose primer pockets.</p><p>My 338-416 Rigby Improved shows the same signs, albeit to a lesser extent in regard to cratering. The firing pin spring is quite stiff in that rifle.</p><p>The AI's still show pressure regardless of the fact that many believe the cases withstand higher pressure due to case shape, which has never been proven, nor has the theory that less body taper results in less bolt thrust and therefore less primer flattening.</p><p>I don't see how this can be true as the flash hole is still what applies the gas force to the primer.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1534475, member: 10755"] I run several Improved cartridges, both AI, and non AI Improved with 45 degree shoulders. I also run a 375 Weatherby that I need to fire form then run semi tested loads in. I find that brass is brass, if you exceed safe pressures, you get cratered primers, ejector marks, loose primer pockets and other embossing on the case head. My 375 Weatherby shows cratered primers, along with flattened primers, as soon as pressure exceeds max. The next step is always ejector marks and loose primer pockets. My 338-416 Rigby Improved shows the same signs, albeit to a lesser extent in regard to cratering. The firing pin spring is quite stiff in that rifle. The AI’s still show pressure regardless of the fact that many believe the cases withstand higher pressure due to case shape, which has never been proven, nor has the theory that less body taper results in less bolt thrust and therefore less primer flattening. I don’t see how this can be true as the flash hole is still what applies the gas force to the primer. Cheers. [/QUOTE]
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Reloading
Sherman Wildcats pressure limits?
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