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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Calculating B.C. with LabRadar. Tutorial on my method.
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<blockquote data-quote="Pdvdh" data-source="post: 2618731" data-attributes="member: 4191"><p>I do pull my LabRadar data off the shot report file, on the memory card. Below is a pic that shows how I manipulate the shot report file to obtain the desired velocity data. I set the LabRadar distances at 20 40 60 80 100 yards. Then the LabRadar shot report file provides the velocities at each of those distances. I program some Excel functions on the shot report file to evaluate the velocity loss per 20 yards for each bullet fired... As well as the total velocity loss across the 100yds.</p><p>Once I'm comfortable with the quality of the velocity data, I use the average velocities from all bullets fired.</p><p>I input the <strong>Avg</strong> MV into my ballistics program, input the atmospheric conditions from the Kestrel at the time/location I collected the velocity data, and then adjust the G7 BC input value until it best matches the <strong>Avg</strong> velocities collected for that batch of bullets.</p><p></p><p>Here's what my typical shot report file looks like, after some tinkering. I've deleted some frivolous columns, and added some Excel functions to help evaluate the data. I think you'll get the gist of it...</p><p></p><p>I own and use the Patagonia Ballistics ColdBore 1.0 Desktop ballistics program.</p><p></p><p>[ATTACH=full]394085[/ATTACH]</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2618731, member: 4191"] I do pull my LabRadar data off the shot report file, on the memory card. Below is a pic that shows how I manipulate the shot report file to obtain the desired velocity data. I set the LabRadar distances at 20 40 60 80 100 yards. Then the LabRadar shot report file provides the velocities at each of those distances. I program some Excel functions on the shot report file to evaluate the velocity loss per 20 yards for each bullet fired... As well as the total velocity loss across the 100yds. Once I'm comfortable with the quality of the velocity data, I use the average velocities from all bullets fired. I input the [B]Avg[/B] MV into my ballistics program, input the atmospheric conditions from the Kestrel at the time/location I collected the velocity data, and then adjust the G7 BC input value until it best matches the [B]Avg[/B] velocities collected for that batch of bullets. Here's what my typical shot report file looks like, after some tinkering. I've deleted some frivolous columns, and added some Excel functions to help evaluate the data. I think you'll get the gist of it... I own and use the Patagonia Ballistics ColdBore 1.0 Desktop ballistics program. [ATTACH type="full" alt="20220824_155852.jpg"]394085[/ATTACH] [/QUOTE]
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Calculating B.C. with LabRadar. Tutorial on my method.
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