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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Prepping the big 300gr SMK???
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<blockquote data-quote="jb1000br" data-source="post: 115167" data-attributes="member: 1459"><p>[ QUOTE ]</p><p>[ QUOTE ]</p><p><strong></strong></p><p><strong>The "bearing surface" is not the caliber sized part of the bullet...</strong></p><p><strong></strong></p><p><strong>the comparitors should be undersized like the SP inserts are since the BORE diameter (groove minus rifling depth) is what you really want to measure...</strong></p><p><strong></strong></p><p><strong>The part that actually touches the barrel is closer to .330" than .338"...</strong></p><p><strong></strong></p><p></p><p>[/ QUOTE ]</p><p>My WASG is most of the transition area (.330 to .338)- ie is not touching at all to FULL .004 deformation is inconsequential in the frictional component. (I did say Wild Arse Scientific Guess and 40 hours of my scientific analysis is worth 4 seconds of Goodgroupers or Kirbys real experience).</p><p></p><p>What you say is true (the .330), but why do you think that is what you want to measure? At the .330 point (not touching, not deforming) there is no friction. </p><p></p><p>[/ QUOTE ]</p><p></p><p>You want to measure the part of the bullet that is touching the bore bore right? Well, measuring closer to .338 than .330 is not doing that...</p><p></p><p>It probably makes no difference though, and I'd bet money it (method) gets lost in the noise...</p><p></p><p>JB</p></blockquote><p></p>
[QUOTE="jb1000br, post: 115167, member: 1459"] [ QUOTE ] [ QUOTE ] [b] The "bearing surface" is not the caliber sized part of the bullet... the comparitors should be undersized like the SP inserts are since the BORE diameter (groove minus rifling depth) is what you really want to measure... The part that actually touches the barrel is closer to .330" than .338"... [/b] [/ QUOTE ] My WASG is most of the transition area (.330 to .338)- ie is not touching at all to FULL .004 deformation is inconsequential in the frictional component. (I did say Wild Arse Scientific Guess and 40 hours of my scientific analysis is worth 4 seconds of Goodgroupers or Kirbys real experience). What you say is true (the .330), but why do you think that is what you want to measure? At the .330 point (not touching, not deforming) there is no friction. [/ QUOTE ] You want to measure the part of the bullet that is touching the bore bore right? Well, measuring closer to .338 than .330 is not doing that... It probably makes no difference though, and I'd bet money it (method) gets lost in the noise... JB [/QUOTE]
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Prepping the big 300gr SMK???
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