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Joined: Jun 2011
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Excellent article. Thank you for posting it.
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
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Joined: Feb 2008
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Campfire Regular
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OP
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The Slippery Factor it shall be.
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Jun 2010
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Campfire Tracker
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Campfire Tracker
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You might also want to read about the drag deceleration method of defining BC, which is more prevalent nowadays given modern measuring equipment.
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Joined: May 2012
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Campfire Regular
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I've read the article a few times now.
I still can't get my head around why sectional density (and hence bullet weight) is used as factor to determine the BC.
I always assumed that it was indeed form factor only (measured by whatever standard) that determined BC.
Can anyone explain why we just don't measure bullets' ballistic efficiency by this "form factor" alone? What is the advantage to including weight?
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Joined: Mar 2006
Posts: 14,475
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Momentum and inertia. Think of a bullet-shaped piece of styrofoam vs a bullet-shaped bullet. Both are shaped identically, so have identical form factors. Which would fly more efficiently through the air- fly farther, get pushed around by the wind less, arrive with more retained velocity, etc?
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Joined: Apr 2010
Posts: 14,680
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2010
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I've read the article a few times now.
I still can't get my head around why sectional density (and hence bullet weight) is used as factor to determine the BC.
I always assumed that it was indeed form factor only (measured by whatever standard) that determined BC.
Can anyone explain why we just don't measure bullets' ballistic efficiency by this "form factor" alone? What is the advantage to including weight? "I still can't get my head around why sectional density (and hence bullet weight) is used as factor to determine the BC." Think about it like this: Throw a ball of cotton.....and a ball of lead! Which one outdistances the other??
Even birds know not to land downwind!
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Joined: May 2012
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Campfire Regular
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Campfire Regular
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Ok weight overcoming drag in concert with bullet shape.
Thanks fellers.
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