08-27-2016, 12:59 AM
acourvil Wrote:...And isn't the drag coefficient a component of ballistic coefficient?The ballistic coefficient is based on the performance of a stnadard projectile. The drag coefficient refers only to the shape of the projectile.
The drag function, size and velocity of the bullet define how quickly energy bleeds out of the bullet from drag.
The bullet's mass and velocity define the energy budget available to resist drag.
The ballistic coefficient is a short hand approximation to the drag coefficient, mass and size of the projectile used in most trajectory calculators. Some, possibly Hornady's, use the drag function, size, weight, and velocity to directly integrate the trajectory. The tend to use a lot of calculations, so run a bit slow in most mobile devices and many desk top computers.
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