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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to true the BC
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<blockquote data-quote="WahooYahoo" data-source="post: 2543142" data-attributes="member: 94632"><p>I use a LabRadar chronograph and I use the <strong>mean</strong> velocity of as many shots as I can. I trust those numbers. I couldn't trust the numbers from my old wonky Chrony. I wouldn't adjust the velocity. </p><p></p><p> I also use the Revic BR4 and I true my data based on drops. </p><p></p><p>BC is fluid, not constant and not linear. The published number is an average. It is a starting point. The BC is based on the test rifle, not mine or yours. </p><p></p><p>Go to distance (before it goes trans-sonic) and measure the drop, true the BC in your calculator based on that drop. All of the data from bore to that range will be on.</p></blockquote><p></p>
[QUOTE="WahooYahoo, post: 2543142, member: 94632"] I use a LabRadar chronograph and I use the [B]mean[/B] velocity of as many shots as I can. I trust those numbers. I couldn't trust the numbers from my old wonky Chrony. I wouldn't adjust the velocity. I also use the Revic BR4 and I true my data based on drops. BC is fluid, not constant and not linear. The published number is an average. It is a starting point. The BC is based on the test rifle, not mine or yours. Go to distance (before it goes trans-sonic) and measure the drop, true the BC in your calculator based on that drop. All of the data from bore to that range will be on. [/QUOTE]
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How to true the BC
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