My father who died in 1951 had a modest collection of Minnie balls, arrowheads, and an unidentified round that I am concerned about. It is 3.70 inches long, 1.50 inches diameter (38mm), has a 1.40" dia. groove, has GWK roll stamped on the side and either an L or 1 on the nose. It has been suggested that it might be a Hotchkiss round with a rear mounted fuse. I’m concerned tht it might be a live round and should be disposed of.
I have photos but don’t know how t insert them.