i have a projectile with almost no markings on it and my original post was on the MCF forum, and someone directed me here because he said you guys would know what this thing is…
its 37mm in diameter, 100mm long, weighs about 500g(about 1 pound) and the only marking on it is a very faint, red “56” on the bottom of it.
one guy on the MCF forum said it looks a lot like a French 37mm HE round from WWI. and he showed me a picture. except his had a flat nose
here is a side picture:
and here is the pic of the french round: