"Tarver Engineering" wrote...

Hitting a target moving at 120 kts with a bullet would be pure luck.

If the target is an airplane, it would be more a matter of skill than luck.

At 120 knots, an object is moving about 200 feet per second. At a range of "a
few hundred yards" (1,000', for a round number), the time of flight for a round
from any modern, high-power rifle would be much less than a second. For
example, a .223 round from an AR-15 or M-16 has a muzzle velocity of 2500-3000
fps, depending on the specific load. The .300 Wby Mag has a muzzle velocity of
2900-3400 fps. Time of flight to 1,000' would be less than 1/2 second.

For a crossing shot on a 747, a lead of less than 100' would be required. Aim
at the nose, and the bullet would still impact the middle of the fuselage (or
the wing section that masks the fuselage). After a couple bracketing shots, a
marksman could easily put 8 rounds from a 10-round clip into the center fuselage
and/or wing section.