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Old 9th March 2021, 06:51 AM   #3
Philip
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Join Date: Dec 2004
Location: California
Posts: 962
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Here's the piece I referenced in the previous post. This example has an inlaid band at the point of maximum expansion, but the concept is unmistakable -- a marked but gradual flaring of the exterior contour of the muzzle, then a more abrupt reduction down to a diameter close to the bore diameter.
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