Zeroing the puff targeting system.......Go out in abandoned field, set height and bank angle, shoot guns, draw crosshairs on side cockpit window where bullets are impacting.
Next, proceeded to target area and have a nice day!
Whatever it was, I’m here to say it worked.
But when you are on the ground, first you see the tracers, note one in five.
Next you hear the projectiles impact the trees and earth.
Then the noise, taking its time at 1100 fps.
Also some simple geometry?
I recall that they were well above tracer burnout 3000’(?).
They are flying at 5000?
The distance from the windscreen to eye is ~2’
Distance to target ~7000? (45 d.)
We are 100m from center of target.
How much head movement can I live with?