1. The tapered leade from the shotgun chamber diameter to the bore diameter. 2. The tapered leade from the bore diameter to the choke diameter. 3. The tapered entrance to the bore in the rear of a revolver barrel.
FORCING CONE
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1. The tapered leade from the shotgun chamber diameter to the bore diameter. 2. The tapered leade from the bore diameter to the choke diameter. 3. The tapered entrance to the bore in the rear of a revolver barrel.