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Old August 6, 2012, 01:58 PM   #1
Jerry45
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Ballistic Calculator Question

Next to Ballistic Coefficient (know the Coefficient) it wants input of G1, G5, G6, G7, GL, RA4. Can someone tell me what that is/means.

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
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Old August 6, 2012, 02:36 PM   #2
azar92
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It's refering to aerodynamic drag models based on particular “standard projectile” shapes. While some manufacturers will list a B.C. using a different model (G7, for example) most list the G1 B.C.

If you don't know, just use G1.
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Old August 6, 2012, 02:39 PM   #3
brmfan
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Here you go...

http://bulletin.accurateshooter.com/...-need-to-know/
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Old August 6, 2012, 03:31 PM   #4
Jerry45
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Thanks guys. For a change I guessed right and used G1. Oops, no I did't I need to use G7.
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Last edited by Jerry45; August 6, 2012 at 04:16 PM.
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