officer and shoot targets from the regular pin placement. Some ranges conduct centerfire handgun competition based on class. When classes are employed, three classes often are recognized: revolver, stock, and pin gun. Magazine capacity may be limited to 8 rounds in most competitions in which magazine-fed guns compete only against magazine-fed guns. In events where revolvers compete with magazine-fed guns, magazines are restricted to seven shots, out of respect for the customary six-shot revolver cylinder. The "pin gun class" is for highly advanced, often very expensive "race guns" in which almost all manner of enhancement is allowed, including optical sights (generally red dot sights) and compensators. zz The pins are placed far enough away from each other that they are unlikely to interact when hit, so a separate shot is needed to down each pin. The broad spacing and different levels make it challenging to move from target to target. Indirect hits will result in pins lying on their sides on the table in a situation known as "deadwood," where multiple shots may be required to clear the pin from the table. "Deadwood" is further complicated in that one deadwood pin may be lying next to another deadwood pin, interfering with a clear path to knocking either deadwood pin from the table. Generally, .22 Long Rifle competitions shoot the tops of the pins, known as "pin-tops," which are lighter and more easily knocked down by the light, comparatively low energy bullets. Occasionally, a .22 match may be shot by placing pins at the very back of the table so that the comparatively light .22 hit will still knock the pin off the table. Some matches are also shot with a semi-automatic or pump-action shotgun, usually firing buckshot. As shotgun rounds quickly disintegrate the pins, such matches are customarily reserved for the end of a match, when a supply of pins unfit for handgun matches may be put to final utility. There are even less common types of matches that allow carbines or submachine guns. Types of competition Bracket-style: "Bracket-style" is shot in pairs of shooters. Each shooter will have his or her own table of pins, and the winner of the round is the shooter whose entire obligation of pins hits the ground first. Pins that are merely in flight do not count until they hit the ground. It is similar to the NCAA Men's Division I Basketball Championship, in