Dave, the order specifies 3 1/2" chambers. Charlie, do you have a letter on your big gun yet? My Vulcan Steel ten has wall thickness no thinner then .100. If my new gun has .100 wall thickness, I will be shooting modern 3 1/2" mag ten lead shells in it. The bores are shiny, so I will measure to see if the thickness is there. The barrels are marked 8-1 if I recall.
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