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摘要

George Trulock has been making interchangeable chokes for shotgun barrels for more than 25 years. The simple-looking parts are indispensible tools for many shooters. An interchangeable choke is a tapered constriction of the gun barrel's bore at the muzzle end that compacts and shapes the charge of pellets to maximize their effectiveness at a certain range. As opposed to fixed chokes that are integral with the shotgun barrel, interchangeable chokes screw on or into the barrel and, by providing different amounts of constriction, enable a shooter to "pattern" his gun for certain game or conditions. Most interchangeable chokes have a conical, parallel internal design, in which a tapering cone blends into a bore with parallel sides. This stabilizes the shot as it leaves the barrel.