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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
QuickLoad over bore weighting factor formula?
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<blockquote data-quote="Deleted member 46119" data-source="post: 1396713"><p>There is a spreadsheet of Weighting factors here: <a href="http://www.mamba-reloading.co.za/QL%20Weighting%20Factor.xls" target="_blank">http://www.mamba-reloading.co.za/QL Weighting Factor.xls</a></p><p></p><p>Using the data from this source and the formula for the "over bore" index from <a href="http://www.accurateshooter.com/technical-articles/overbore-cartridges-defined-by-formula/" target="_blank">http://www.accurateshooter.com/technical-articles/overbore-cartridges-defined-by-formula/</a></p><p></p><p>I tried to find a correlation.</p><p></p><p>I think I got it. It's odd but it is very close or exact for Pierre van der Walt's numbers.</p><p></p><p>Basically Magic number/Overbore Index.</p><p></p><p>For bottle neck cases the magic number is 500.</p><p></p><p>Example 223 Remington: van derWalt publishes .69, my formula is <strong>500</strong>/773.9 = 0.65 for Weighting Factor.</p><p></p><p>Is this "perfect" no. Do the numbers make my real vs. QuickLoad closer, oh yeah.</p></blockquote><p></p>
[QUOTE="Deleted member 46119, post: 1396713"] There is a spreadsheet of Weighting factors here: [URL='http://www.mamba-reloading.co.za/QL%20Weighting%20Factor.xls']http://www.mamba-reloading.co.za/QL Weighting Factor.xls[/URL] Using the data from this source and the formula for the "over bore" index from [URL]http://www.accurateshooter.com/technical-articles/overbore-cartridges-defined-by-formula/[/URL] I tried to find a correlation. I think I got it. It's odd but it is very close or exact for Pierre van der Walt's numbers. Basically Magic number/Overbore Index. For bottle neck cases the magic number is 500. Example 223 Remington: van derWalt publishes .69, my formula is [B]500[/B]/773.9 = 0.65 for Weighting Factor. Is this "perfect" no. Do the numbers make my real vs. QuickLoad closer, oh yeah. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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QuickLoad over bore weighting factor formula?
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