[Dusty Road]

At that elevation the drop would be minimal, much less than fired at horizontal.

[Magnum44]

The drop is determined by the horizontal range, and time of flight. You can do this with simple physics equations of motion but ballistics calculators will do this for you. 60 to 70 inches for a standard 308 win at 500-600 yards.

[nonsporting]

At that elevation the drop would be minimal, much less than fired at horizontal.

I calculated an approx 16.44 degree down angle. I guessed elevation of 118 yards for the 32nd floor. This was based on high rise estimation -- I do not recall the link.

tan(theta) = 118.0/400.0   # for 400 yards

Using python.math package:

>>> import math
>>> math.degrees(math.atan(118.0/400.0))
16.436059224635645

Shooting Uphill/Downhill by Maj. John L. Plaster, USAR (Ret)

Sierra shows a drop of 50 inches for a 55gr bullet at 400 yards (muzzle velocity 3000fps -- for a 16" barrel).

15 Degrees: Drop Inches x .034 = 1.7 inches

Up/down angle impact is insignificant.