Testing and Calculating G7??

[Gunneegoogoo]

Has anyone here done this??

I know you need velocities at two different ranges, the bullets sectional density (easily calculated), and something call the "coefficient of form". Where does that come from??

I know it's based on shape relative to the standard G7 projectile (1 = the standard projectile, less than 1 is slipperier), but how does one get the number??

Thx

-J.

 

[MikeinCalgary]

I bought a book from Bryan Litz a few years ago on ballistics and he described how he did it; maybe check that out.

 

[Gunneegoogoo]

Will do