This video demonstrates a common gunsmithing technique for determining unknown firearm calibers using Brownells Cerrosafe casting alloy. The presenter, Eric, utilizes this low-melting-point, high-fill alloy for chamber and muzzle casts. The featured firearm is an antique German Cape Gun, which has a 16 gauge smoothbore on one barrel and an unidentified rifle caliber on the other. The video aims to reveal the caliber of the rifle barrel.
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