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+--- Thread: 600 Yds & Beyond (/showthread.php?tid=11444)
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600 Yds & Beyond - Smitters - 09-25-2017
Alright I know take way off topic, sort of. I see you all talking about the G(insert number) BC. I gather that is ballistic coefficient but what does the G number represent.
Also I just started running an 18" Model 1 sales 6.5 sporter upper with a 1:9 twist.
600 Yds & Beyond - VASCAR2 - 09-25-2017
There are two seperate Ballistic Coefficients listed for specific bullets by many manufactures, G-1 uses one computer simulation whereas G-7 is another simulation later devloped to better predict trajectory at long range 800+ yards/meters. Many shooters using G-7 derived data from the ballistic apps with specfic weather, altitude ballistic info get better results shooting out to and beyond 1000 yards.
600 Yds & Beyond - SDet - 09-25-2017
Kind of
So, any bc can be done with a computer, by hand, direct testing, whatever you'd like. What the number following the g represents, is the standard shape that the bc is calculated from.
The bc is a relation between the standard shape, think powerbelt like shape for g1 and a spitzer for g7, and the weight of the bullet. It's pretty much the excepted way to look at how well the bullet conserves energy in flight, higher is of course better.
http://www.bergerbullets.com/form-factors-a-useful-analysis-tool/
600 Yds & Beyond - Smitters - 09-27-2017
I'm growing to love this forum more and more!!! Thank you for the excellent information! I say this with the most respect for other forums...but this one is way better!