Recently found this 9mm in dad's basement. I have never seen anything like it. I cut one apart and I believe it is steel jacketed and steel core. It was fairly difficult to cut through and both the jacket and core are magnetic.
http://i158.photobucket.com/albums/t...r/f4839511.jpg
http://i158.photobucket.com/albums/t...r/8b8fd1af.jpg
And the box.
http://i158.photobucket.com/albums/t...r/2ac9748e.jpg
http://i158.photobucket.com/albums/t...r/80611f10.jpg
Any ideas?