Bullets “drop like a rainbow” do to lost velocity, which the above factors have minuscule affect on.
The author doesn’t know what he is talking about.
That's for sure. It is simple distance equals 1/2 acceleration times time squared. How ever much a bullet drops in one second it will fall 4 times that much in 2 seconds. Add to that the fact that it is slowing down so it is covering less distance in that second second.
A bullet always drops 6 feet in the same amount of time.
The only question is how far it traveled in that same amount of time.