Where can I get reliable data on rifling twist in order to have a custom bbl in .22 Savage Hi-Power made for a Thompson Contender Carbine? - Quora
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A flintlock rifle with a twisted barrel and heart shaped bore from 1765, formerly owned by George IV, now part of the royal collection. : r/GunPorn
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Machine Gun Barrel Rifling Tool Manufacturing, PNG, 2497x1668px, Watercolor, Cartoon, Flower, Frame, Heart Download Free
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