2,200mm cannon - for those looking for BIG caliber weapons

Sorry, but a bowling ball would be approximately 280mm. I'm just guessing that a bowling ball is approximately 11 inches in diameter, times 25.4 per inch (1"=25.4mm) would equal 279.4mm. Hardly 2,200mm!!

Still kind of cool though!! :scared::scared::boom::boom:
 
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