The weight and shape of the bullet, the speed at which the bullet leaves the gun, and the degree of tilt of the barrel above the horizontal.
Weight, velocity, and shape of the bullet.
Factors include the angle at which it is fired, the speed of the projectile, its shape (ballistic coefficient) the air pressure and humidity.
Gravity
velocity
velocity
The first factors are: Speed, weight, and shape of the projectile. Speed will be determined by the powder charge used to drive the bullet, and the length of the barrel. Elevation angle (the angle at which the barrel points upward) will then increase or decrease the range based on the first three factors. For most firearms the optimal elevation angle is between 30 and 40 degrees for maximum range. Other lesser factors include the weather (wind, humidity, temperature) and altitude. Even the Coriolis Effect can play a small factor.
Fishing is a factor that affects aquatic life in the ocean. So is water pollution.
Variable
Variable
Variable
Variable
projection speed projection angle projection height