Ballistic Calculator Question

Jerry45 · August 6, 2012, 02:58 PM

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

azar92 · August 6, 2012, 03:36 PM

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.

brmfan · August 6, 2012, 03:39 PM

Here you go...

http://bulletin.accurateshooter.com/...-need-to-know/

Jerry45 · August 6, 2012, 04:31 PM

Thanks guys. For a change I guessed right and used G1.

Oops, no I did't I need to use G7.

August 6, 2012, 02:58 PM	#1
Jerry45 Senior Member Join Date: April 19, 2000 Location: Metairie, Louisiana Posts: 751	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 __________________ Guns are not dangerous! People are! RKBA!

August 6, 2012, 04:31 PM	#4
Jerry45 Senior Member Join Date: April 19, 2000 Location: Metairie, Louisiana Posts: 751	Thanks guys. For a change I guessed right and used G1. Oops, no I did't I need to use G7. __________________ Guns are not dangerous! People are! RKBA! Last edited by Jerry45; August 6, 2012 at 05:16 PM.

August 6, 2012, 03:36 PM	#2
azar92 Senior Member Join Date: April 16, 2009 Location: Utah Posts: 187	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.

August 6, 2012, 03:39 PM	#3
brmfan Senior Member Join Date: October 21, 2008 Posts: 521	Here you go... http://bulletin.accurateshooter.com/...-need-to-know/