What is the trajectory of the bullet?

The exit velocity of the bullet is basically supersonic, and the bullet in flight is invisible to the naked eye. They can only be captured by high-speed photography:

Bullets can also be said to be the product of civilization integrating physics, chemistry, materials science, aerodynamics and technology. Although its use is related to killing people, bullets are still the only choice for human beings before the emergence of new technologies to project energy.

The direct distance is determined by the height of the target and the low extension of the trajectory. The higher the target (our side is lower than the enemy), the lower the trajectory and the greater the direct distance; The lower the target (our side is higher than the enemy), the more curved the trajectory and the shorter the direct distance. Of course, there is another situation, that is, although the target is different from yours, you have an angle to aim at him directly, and then hit him with all your strength (be careful when the direct distance is too far).