the kind of shotgun shell that is used to kill large game and people. it's what police and criminals use in their shotguns to kill humans. it comes in different sizes, the smaller the shot, the greater number of pellets. #4 buckshot pellet is about the size and velocity of a .22lr. there are 27 pellets in one round of #4 buckshot. 00 buckshot has larger pellets but only has 9-12 pellets per shell.