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Stubby--Lapua
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<blockquote data-quote="davewilson" data-source="post: 158192" data-attributes="member: 4491"><p>Kirby, with an answer like that you're gonna have to run for political office! in terms of SD, that would be a cross-section of the bullet, or the SURFACE AREA that's being pushed on. your example was 2 bullets weighing the same would have different bearing surface lengths resulting in less friction equating to more velocity. we'll have to make all the other parts of the equation equal like faster powder. of course you'll use faster powder,the expansion ratio is higher so it's needed to keep the pressure the same.the extra velocity is because of the increased surface area being pushed on, not a shorter, or less bearing surface.</p><p></p><p>now what office are you running for this fall? /ubbthreads/images/graemlins/grin.gif</p></blockquote><p></p>
[QUOTE="davewilson, post: 158192, member: 4491"] Kirby, with an answer like that you're gonna have to run for political office! in terms of SD, that would be a cross-section of the bullet, or the SURFACE AREA that's being pushed on. your example was 2 bullets weighing the same would have different bearing surface lengths resulting in less friction equating to more velocity. we'll have to make all the other parts of the equation equal like faster powder. of course you'll use faster powder,the expansion ratio is higher so it's needed to keep the pressure the same.the extra velocity is because of the increased surface area being pushed on, not a shorter, or less bearing surface. now what office are you running for this fall? [img]/ubbthreads/images/graemlins/grin.gif[/img] [/QUOTE]
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