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A choke is designed to alter or shape the distribution of the shot as it leaves the firearm. For shooting most game birds and clay pigeons, a desirable pattern is one that is as large as possible while being dense enough to ensure multiple hits on the target, at a particular range. The choke should be tailored to the range and size of the targets.
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.
Some shotgun shooting sports, such as skeet shooting, use crossing targets presented in a narrow range of distance, and only require one level of choke. [5] Other sports, like sporting clays , give the shooter targets at differing ranges, and targets that might approach or recede from the shooter, and so must be engaged at differing ranges.
The choke should be tailored to the range and size of the targets. A skeet shooter shooting at close targets might use 127 micrometres (0.005 inches) of constriction to produce a 76 cm (30 in) diameter pattern at a distance of 19 m (21 yd).
From tightest to loosest, the various choke sizes are: full choke, improved modified, modified, improved cylinder, skeet, and cylinder bore. [ 21 ] A hunter who intends to hunt an animal such as rabbit or grouse knows that the animal will be encountered at a close range—usually within 20 m (22 yd)—and will be moving very quickly.
With an open choke, the reduction in diameter is minimal, so accuracy does not suffer much; tighter chokes, however, deform the slug enough to impact accuracy significantly, and the impact of the slug on the choke (at velocities around 450 meters per second (1500 feet per second)) could also stretch the barrel with repeated firings.
Olympic skeet is a variant of skeet shooting, and the specific variant used in the Olympic Games. The discipline is sanctioned by the International Shooting Sport Federation . Two throwing machines at different heights launch a series of 25 targets in a specific order, some as singles and some as doubles, with the shooter having a fixed ...
Barrel lengths can be purchased from 26 inches (66 cm) for skeet shooting to 32 inches (81 cm) for sporting clays and trap shooting. The top barrel has a vented rib attached by soldering for the entire length of the barrel tube. Newer Citori internal barrels are chrome-lined for added surface strength.