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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 mm SHERMAN SHORTMAG vs 7 SAUM
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<blockquote data-quote="B23" data-source="post: 1250844" data-attributes="member: 13222"><p>That's all well and good but using RL26 & 180 Berger bullet as the constant, isn't higher pressure needed to increase the bullets velocity?</p><p></p><p>Considering pressure monitoring equipment isn't being used and we're only going off bolt thrust, ie. bolt lift and ejector marks, couldn't the fact that this is a case with minimal body taper, which most will agree slows the exerted reward force, and that is possibly masking higher chamber pressures?</p><p></p><p>I understand you believe this to be a more efficient case design over SAAMI but aren't you packing more of the same powder in a case with slightly less capacity and using the same bullet yet getting higher verlocity? If yes, how does that not equal higher chamber pressure? Does a 40 degree shoulder some how flatten the pressure curve?</p><p></p><p>For me, the physics don't add up but I'll voluntarily admit I'm not the sharpest pencil in the box.</p></blockquote><p></p>
[QUOTE="B23, post: 1250844, member: 13222"] That's all well and good but using RL26 & 180 Berger bullet as the constant, isn't higher pressure needed to increase the bullets velocity? Considering pressure monitoring equipment isn't being used and we're only going off bolt thrust, ie. bolt lift and ejector marks, couldn't the fact that this is a case with minimal body taper, which most will agree slows the exerted reward force, and that is possibly masking higher chamber pressures? I understand you believe this to be a more efficient case design over SAAMI but aren't you packing more of the same powder in a case with slightly less capacity and using the same bullet yet getting higher verlocity? If yes, how does that not equal higher chamber pressure? Does a 40 degree shoulder some how flatten the pressure curve? For me, the physics don't add up but I'll voluntarily admit I'm not the sharpest pencil in the box. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 mm SHERMAN SHORTMAG vs 7 SAUM
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