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			Hubel458,  I have a 12 gauge paper case in my collection that is about 6" long.  I was told they were used for turning over the radial aircraft engines to help start them in WWII.  Apparently the engines had a receptacle where the shell was inserted and could be fired by the pilot to help turn the engine over when he hit the starter button. I knew it had to be some kind of industrial use.
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