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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
257 Allen Magnum progress continues to another level...
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<blockquote data-quote="ricka0" data-source="post: 57545" data-attributes="member: 3086"><p><strong>. In past tests the STW proved to produce about 47 fps more velocity p</strong></p><p></p><p>[ QUOTE ]</p><p><strong><em>. In past tests the STW proved to produce about 47 fps more velocity per inch of barrel length. </em></strong>. </p><p></p><p>[/ QUOTE ] </p><p>I'd be a little bit cautious about total V increase projections, as my graph <a href="http://groups.msn.com/_Secure/0TgApA6kXub7L4ebalMvfkKyaOBFs6bg3tOShgEeCll2Y!afTW6utQotQrI8Rp1YAY0nEk2RUTl8I*aTgnKhGBDVPjJXaCPKXbL0oBIFtK*jYcNkLhBNP*A/Differential_Vel_Gain2.JPG?dc=4675492134890830198" target="_blank">Differential Vel Gain</a> shows. I'd embed the graphic here but this /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/wink.gif software has an absurdly low limit on URI length.</p><p></p><p>The data comes from a Program Daniel Lilja wrote. He sent me the code to modify (because alot of 50 guys are shooting out of 18" barrels) - so I will be extending the length from 18" to 48"</p><p></p><p>The graph clearly shows the diminishing returns of FPS - and the curve is pretty steep around 28"</p></blockquote><p></p>
[QUOTE="ricka0, post: 57545, member: 3086"] [b]. In past tests the STW proved to produce about 47 fps more velocity p[/b] [ QUOTE ] [b][i]. In past tests the STW proved to produce about 47 fps more velocity per inch of barrel length. [/i][/b][i][/i]. [/ QUOTE ] I'd be a little bit cautious about total V increase projections, as my graph [url="http://groups.msn.com/_Secure/0TgApA6kXub7L4ebalMvfkKyaOBFs6bg3tOShgEeCll2Y!afTW6utQotQrI8Rp1YAY0nEk2RUTl8I*aTgnKhGBDVPjJXaCPKXbL0oBIFtK*jYcNkLhBNP*A/Differential_Vel_Gain2.JPG?dc=4675492134890830198"]Differential Vel Gain[/url] shows. I'd embed the graphic here but this [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/wink.gif[/img] software has an absurdly low limit on URI length. The data comes from a Program Daniel Lilja wrote. He sent me the code to modify (because alot of 50 guys are shooting out of 18" barrels) - so I will be extending the length from 18" to 48" The graph clearly shows the diminishing returns of FPS - and the curve is pretty steep around 28" [/QUOTE]
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257 Allen Magnum progress continues to another level...
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