Kenneth W. Physics.3rd ed . The World Book Encyclopedia. World Book, 1998. The World Book Encyclopedia. World Book, 1998.
Speeds fluctuate and depend upon several factors.
Gravity makes a projectile fall toward the earth while in flight. The projectile's size, shape, and the air density affect the speed by which it travels. Air resistance slows the speed of a bullet and reduces the distance by which it travels. Shotgun pellets vary very little in velocity.