01 n. In a shotgun, a bore which is tapered to a slightly smaller diameter at a short distance (usually 2<frac:1_2/ to 3 inches) to the rear of t…
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1.
In a shotgun, a bore which is tapered to a slightly smaller diameter at a short distance (usually 2<frac:1_2/ to 3 inches) to the rear of the muzzle, in order to prevent the rapid dispersion of the shot.
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2.
A shotgun that is made with such a bore.