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Scientific American but to have been used as the powder chamber. The iron bullet was found in direct contact with the pow der, and in front of it were the remains of a wad of rough fiber, apparently manila oakum. The bore of the gun is one and five·eighths inches. ,A round hole at the end was for ramming and cleaning out the gun between the shots. This gun, therefore, takes its place among the earliest known breech-loading guns.doi:10.1038/scientificamerican06181904-483b fatcat:v7l357rvprhqphkadtzhonmuoa