someone posted pics after firing.
Apparently they have big hollow bases just like a Foster slug & also have gaping hollow point.
They are some sort of slug imported from Italy.
Edit: another pic the guy posted:
^The caption to the pic mentioned the slug was 'stuck between the 2nd and 3rd board'
Here is the thread link:
http://www.canadiangunnutz.com/forum...e-of-200/page4
Here is the post: