It's been awhile since I've posted. I went away and became a Combat Engineer and spent some time blowing stuff up. We were doing a cleanup after our last demolitions range when I discovered at my feet this little gem.

Anyway, after waiting several hours for EOD, they came and blew it up for us. Anybody want to take a stab at identifying it?
We were thinking tank or artillery shell, but definitely a projected projectile with a fuse and a frag sleeve.
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