Bullets from Maspero

These bullets were shown to me by relatives of the victims of the October 9 massacre at Maspero. Anyone have any insight on the type of ammunition used or the markings on the casings? Click on the pics for a larger size.

Update on 2011-10-12 14:51 by Issandr El Amrani

Here is another picture of a bullet used on the evening of October 9 at Maspero — it looks unused to me, but with all you knowledgeable people around, I'd appreciate any thoughts:

Pic by Sarah Carr (click to enlarge)