WW1 Munitions -- Ever hear of a JJ Can?? JJ Con??

[boomer656]

I agree. I appreciate your time to help identify the meaning of this phrase.

Reading the document, you can tell that it is written exactly as he would have spoken - you can almost hear him speaking (and with the info from Sunray, he has a Texas drawl). From the context, it was fairly clear he was talking about some sort of shelling, but to understand the expressions being used makes it even more interesting.