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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Issue with vortex fury 5000 AB
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<blockquote data-quote="QuietTexan" data-source="post: 2907728" data-attributes="member: 116181"><p>There's nothing to see because there is no BC - there isn't a drag model assumption because it's based on actual data from bullet flight paths. That's why it's called CDM - Custom Drag Model. Since there's no single modeled coefficient of form none of the formulas work. Even if they took each unique coefficient and did the math with it, there wouldn't be direct comparison between G1, G7, and CDM other than form factor.</p><p></p><p>The different drag models make assumptions based on bullet shape, which is why Berger shows Form Factor to describe how closely to the model a given bullet is.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2907728, member: 116181"] There's nothing to see because there is no BC - there isn't a drag model assumption because it's based on actual data from bullet flight paths. That's why it's called CDM - Custom Drag Model. Since there's no single modeled coefficient of form none of the formulas work. Even if they took each unique coefficient and did the math with it, there wouldn't be direct comparison between G1, G7, and CDM other than form factor. The different drag models make assumptions based on bullet shape, which is why Berger shows Form Factor to describe how closely to the model a given bullet is. [/QUOTE]
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Long Range Scopes and Other Optics
Issue with vortex fury 5000 AB
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