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The Water Cooler
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Bowling ball fun
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<blockquote data-quote="TheDoubleD" data-source="post: 3998025" data-attributes="member: 43754"><p>This bowling ball mortar has a reduced chamber just as the British 1844 siege mortar had. The barrel OD is 11.5". Ball bore is 8.6". North South Skirmish Association safety guidelines call for minimum one caliber wall thickness over the chamber made of steel. The chamber is 3 inches in diameter, ID. This is the caliber-3". Wall thickness over the chamber 4.125". The chamber is just not steel but is 4140 gunsteel, exceeding minimum safety guidelines.</p><p></p><p>Here is the breech plug.</p><p>[ATTACH=full]360738[/ATTACH]</p></blockquote><p></p>
[QUOTE="TheDoubleD, post: 3998025, member: 43754"] This bowling ball mortar has a reduced chamber just as the British 1844 siege mortar had. The barrel OD is 11.5". Ball bore is 8.6". North South Skirmish Association safety guidelines call for minimum one caliber wall thickness over the chamber made of steel. The chamber is 3 inches in diameter, ID. This is the caliber-3". Wall thickness over the chamber 4.125". The chamber is just not steel but is 4140 gunsteel, exceeding minimum safety guidelines. Here is the breech plug. [ATTACH type="full"]360738[/ATTACH] [/QUOTE]
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