Well if you want to talk about real physics-
The range of any projectile is NOT (V^2)*cos(2*theta)/g - that's oversimplifying it.
Range is determined over time by the air drag towards the projectile in motion. This depends on the ballistic coefficient (or coefficient of drag nowadays), the density of the fluid.
It's also depends on the length of the projectile, center of gravity, and the gyroscopic spin on the projectile - which keeps it a relatively stable CD and therefore stable drag throughout.
That's the bigger impacts- the smaller ones include stuff like the Coriolis effect (east-west, west-east distance changes).
So- yes, muzzle velocity is the most important factor (caliber determines muzzle velocity and thus really shouldn't count in NF ranges) but that simple equation you gave is far from the truth of the matter.
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