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-   -   .223 Ballistic Coefficient? (http://www.firearmstalk.com/forums/f30/223-ballistic-coefficient-57981/)

lehill66 02-17-2012 07:12 PM

.223 Ballistic Coefficient?
 
I recently got an app on my phone that calculates bullet drop for me (which is awesome), but one of the inputs is "ballistic coefficient".

I use PMC Bronze FMJ .223, 55 grain, 3200 fps. All I want to know is one of the following:

1. What is the BC for this exact round; or
2. What number can I use to be reasonably accurate?

I just spent 2 hours of my life searching the web to try and find a decent BC calculator and I found out that I need a f'ing degree in astrophysics just figure this out.

jpattersonnh 02-17-2012 07:33 PM

.226. Used the JBM calculater. They have many bullets already in the system. BTW, that round is closer to 3000fps.


http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi


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