.38 caliber pistol

Sometimes known as a .38 special, this caliber of gun can be found with either a revolving or a semi-automatic firing mechanism. In addition, the bullets fired from this gun can be either center-fired or rimmed. Center-fire cartridges are primed and struck in the center of the cartridge base, whereas rim-fire cartridges are primed and struck on the protruding rim on the base of the cartridge. Due to its minimal recoil, which is the reactive movement of a gun after firing, and its accuracy, the .38 caliber is a popular gun.