Pellet is an ammunition which is made of lead and in most cases it is intended for air guns. Pellets are mostly made in the following calibers: 4.5 mm, 5.5 mm, 6.35 mm. Sport shooters are sometimes called as an alchemists, because choosing the right pellets is really hard.
The correct choice can significantly affect the accuracy and effectiveness of your weapons. Pellet shapes are different, depending on what you want to use them. An important difference between steel BBs and pellets is that BBs are used in weapons which do not have a grooved barrel.