01-20-2015, 02:24 AM
"Ballistic coefficients are based on standard projectile's that, by convention, are 1" in diameter and weigh one pound. It therefore has a sectional density of 1. As the standard it is declared to have a ballistic coefficient of 1. Projectiles that are slowed faster by drag than the standard projectile is, will have BC's lower than one. Those that are not slowed as quickly will have BC's greater than 1 (artillery shells, for example)." http://www.shootersforum.com/ballistics-...post464902