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Rifles, Reloading, Optics, Equipment
Reloading
ladder test? does it work
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<blockquote data-quote="AJ Peacock" data-source="post: 146430" data-attributes="member: 4885"><p>Hi CS, I figured it wouldn't take you too long to show up on this thread /ubbthreads/images/graemlins/wink.gif</p><p></p><p>[ QUOTE ]</p><p>I</p><p>If a load of powder "A" gives tiny groups at 3,200 fps... the same velocity with powder "B" might give humongous groups. So that fact right there kills the harmonic, or node theory. </p><p></p><p>[/ QUOTE ]</p><p></p><p>Not exactly, since different powders can have VASTLY different pressure curves the harmonics would be HUGELY different between the powders. I don't think ANYONE is claiming that a load with powder A will then translate to a load with powder B. That is just plain silly. I can get the same velocity using vastly different powders and they won't shoot even close to the same place (IMR 4350 and H50BMG for example). </p><p></p><p>CS, point out where someone of note is claiming that different powders at the same velocity will give the same type groups with different powders (talking small groups here, sub 1/2MOA, as anything larger than that really doesn't matter). Just post a link and I'll take a look.</p><p></p><p>For the initial poster, here is a link to a discussion on barrel harmonics FWIW.</p><p><a href="http://www.rifle-accuracy.com/harmonics.htm" target="_blank">http://www.rifle-accuracy.com/harmonics.htm</a></p><p></p><p>Nice day gentlemen,</p><p></p><p>Don</p></blockquote><p></p>
[QUOTE="AJ Peacock, post: 146430, member: 4885"] Hi CS, I figured it wouldn't take you too long to show up on this thread [img]/ubbthreads/images/graemlins/wink.gif[/img] [ QUOTE ] I If a load of powder "A" gives tiny groups at 3,200 fps... the same velocity with powder "B" might give humongous groups. So that fact right there kills the harmonic, or node theory. [/ QUOTE ] Not exactly, since different powders can have VASTLY different pressure curves the harmonics would be HUGELY different between the powders. I don't think ANYONE is claiming that a load with powder A will then translate to a load with powder B. That is just plain silly. I can get the same velocity using vastly different powders and they won't shoot even close to the same place (IMR 4350 and H50BMG for example). CS, point out where someone of note is claiming that different powders at the same velocity will give the same type groups with different powders (talking small groups here, sub 1/2MOA, as anything larger than that really doesn't matter). Just post a link and I'll take a look. For the initial poster, here is a link to a discussion on barrel harmonics FWIW. [url="http://www.rifle-accuracy.com/harmonics.htm"]http://www.rifle-accuracy.com/harmonics.htm[/url] Nice day gentlemen, Don [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
ladder test? does it work
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