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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question about Ballistic Scaling
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<blockquote data-quote="mechengr" data-source="post: 1203206" data-attributes="member: 75894"><p>I don't believe this formula is out of context since it is straight out of the Applied Ballistics book, used in the context of scaling bullets of similar shape (i.e. form factor). Like I mentioned, it's derived from the BC equation under the assumption of equal form factor. He doesn't explicitly derive it in the book, step-by-step, but that's where his scaling equation comes from.</p><p></p><p>I agree, if I already knew the form factor (as from Bryan's testing provided in the appendix) then this whole exercise would be unnecessary. My reason for doing this is because I do not already know an accurate form factor of this new bullet and thought I would try Bryan's scaling technique to predict a (hopefully) accurate G7 BC. Sierra's literature only lists G1 BC for this bullet.</p></blockquote><p></p>
[QUOTE="mechengr, post: 1203206, member: 75894"] I don't believe this formula is out of context since it is straight out of the Applied Ballistics book, used in the context of scaling bullets of similar shape (i.e. form factor). Like I mentioned, it's derived from the BC equation under the assumption of equal form factor. He doesn't explicitly derive it in the book, step-by-step, but that's where his scaling equation comes from. I agree, if I already knew the form factor (as from Bryan's testing provided in the appendix) then this whole exercise would be unnecessary. My reason for doing this is because I do not already know an accurate form factor of this new bullet and thought I would try Bryan's scaling technique to predict a (hopefully) accurate G7 BC. Sierra's literature only lists G1 BC for this bullet. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Question about Ballistic Scaling
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