Here's a little ballistic principle to ponder: You are out in the Bonneville salt flats. Perfectly level. You have a rifle mounted in a vise with the barrel perfectly leveled. Youalso have a bullet suspended at the muzzle of the rifle with an electronic release that allows that bullet to free fall downward at the exact instant the bullet coming down the rifle barrel exits the muzzle. Regardless of caliber, bullet weight, velocity, crosswind, or ballistic coefficient - both bullets willstrike the ground at exactly the same instant.

The issue is how far the bullet fired from the rifle barrel can travel before it hits the ground. Time of flight to the ground is always the same.