Need info on this old artillery ammo

[fernando]

Much obliged for all that input, Wayne

Originally Posted by kronckew

shells were cast in sand molds with the central sphere of sand/clay that would be removed thru the hole later....

Let me not think that this example was stolen from the Arsenal and the present contents is still the casting inert material
... just kiding

Originally Posted by kronckew

... possibly being in the home of the cork oak, they found they could use a smaller hole with a higher quality cork plug? ...

Nice reasoning ... and another use for cork