I think what you ment was a mass to frontal area to velocitity conversion yes ?

Try it like this:
a pound of lead will fall at a given rate . if it is 12x12 inches it will fall slower than if it is 2x2 inches .
the same is true given a copper ball of a given wieght and an identical lead ball that is heavierthe lead ball falls faster.

Thats why tungsten shot in lead sizes atlead velocities kills coyotes and geese at ranges about 15yds longer than lead and twice as far as steel .