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Not on this ,we were finding the remains of these ,and at first it was thought they were mines ,it took me a year to finally find out what they were,,attatched pic shows them as we found them,they use the same propelling cartridge as the blacker bombard and the spigots are identicle
You're completely correct
Someone picked me up on it after the thread and was eventually able to find out that the diameter of the 40lb bomb was in fact 229mm.....which is surely in old imperial measurements, 9 inches.
Quite where the 290mm comes from, I Can only assume it's the length of the spigot inside the barrel?... Other than that I have no idea
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