Thread: Question

Originally Posted by gimp

Nope. BC takes into account weight.


Attachment 9023


(M is Mass)

Ah, fair enough, never seen that equation before!

I take it Cd is drag coefficient? What are the A, p and l?

Originally Posted by Spudattack

Ah, fair enough, never seen that equation before!

I take it Cd is drag coefficient? What are the A, p and l?

BC = ballistic coefficient as used in physics and engineering
M = mass
A = cross-sectional area
Cd = drag coefficient
ρ (rho) = average density
l = body length



Bullet BC calculation is different but still takes mass into account.



BC = ballistic coefficient
SD = sectional density, SD = mass of bullet in pounds or kilograms divided by its caliber squared in inches or meters; units are lb/in2 or kg/m2.
i = form factor, i= CB/CG, (CG ~ 0.5191)
CB = Drag coefficient of the bullet
CG = Drag coefficient of the G1 model bullet
M = Mass of bullet, lb or kg
d = diameter of bullet, in or m