I just bought at the local gun show.
It’s 553mm long, 114mm over the fins and 41mm at the thickest point of the body and weighs 3865 grams (136,3 ounces).
It’s been fired into something soft as the point is only slightly bent. Someone may have painted it after it was fired. The fins have one-side sharpened forward edges which might induce some slight clockwise rotation(?)
Story was it was from an 120mm tank gun, probably on a Leopard II.
I have looked at pretty pictures on Google but none seems to match the short fat one I got here.
Markings are: (lower body)
7 (maybe a broad arrow)