Skeet
The firearm of choice for this task is usually a high-quality, double-barreled over and under shotgun with 24- to 32-inch barrels and very open chokes. Often, shooters will choose an improved cylinder choke (one with a tighter pattern) or a skeet choke (one with a wider pattern), but this is a matter of preference. Some gun shops refer to this type of shotgun as a skeet gun. Skeet chokes are designed to produce a 30-inch shot pattern at 21 yards.
Alternatively, a sporting gun or a trap gun is sometimes used. These have longer barrels (up to 34 inches) and tighter choke. Many shooters of American skeet and other national versions use semi-automatic shotguns and break-open over-and-under shotguns.
The event is in part meant to simulate the action of bird hunting. The shooter shoots from seven positions on a semicircle with a radius of 21 yards (19 m), and an eighth position halfway between stations 1 and 7. There are two houses that hold devices known as "traps" that launch the targets, one at each corner of the semicircle. The traps launch the targets to a point 15 feet (4.6 m) above the ground and 18 feet (5.5 m) outside of station 8. One trap launches targets from 10 feet (3.0 m) above the ground ("high" house) and the other launches it from 3 feet (0.91 m) above the ground ("low" house).
At stations 1 and 2 the shooter shoots at single targets launched from the high house and then the low house, then shoots a double where the two targets are launched simultaneously but shooting the high house target first. At stations 3, 4, and 5 the shooter shoots at single targets launched from the high house and then the low house. At stations 6 and 7 the shooter shoots at single targets launched from the high house and then the low house, then shoots a double, shooting the low house target first then the high house target. At station 8 the shooter shoots one high target and one low target.
The shooter must then re-shoot his first missed target or, if no targets are missed, must shoot his 25th shell at the low house station 8. This 25th shot was once referred to as the shooter's option, as he was able to take it where he preferred. Now, to speed up rounds in competition, the shooter must shoot the low 8 twice for a perfect score.