Not common at all. Late war only and in limited number of battles. Mobile among them maybe?
Two different types of segments: "trapezoidal" - 4 sided diamond shape and pentagonal shape 5 sided.
I have frags of each type. The 4 sided ones are significantly thicker and heavier than the 5 sided (more than you would think)
Somewhere I have an intact unfired 12pdr shell. A Captain Mallett was the inventor or creator.
As far as I know the US never produced any.
That's all I can dredge up from my memory right now.
Segmented Shells had lines of weakness cast into the carcass of the shell so that it would fragment into a certain number of pieces where an ordinary shell might only fragment into a couple of pieces.
Segmented Shells had lines of weakness cast into the carcass of the shell so that it would fragment into a certain number of pieces where an ordinary shell might only fragment into a couple of pieces. View attachment 550615