There’s also the matter of the gravitational pull that the bullet exerts on the Earth. But, that’s a little beyond the scope of the article.
As the bullet gets closer to the surface of the earth, then the pull it exerts on the earth would also increase.
This is also a function of the speed of the bullet, as velocity increases, so does mass, and therefore gravitational force.
A bullet traveling very close to the speed of light could conceivably pull the earth out of its orbit.