Bit of an odd title I know but that is what it is. I found this patent while searching for something else and thought it interesting enough to post here. I know it is not strictly ammunition, well it is of sorts.
Seems like back in the days of body snatchers, these things were placed on the chest of the dead person being buried to deter the robbers, sorry it is a low resolution picture. Not sure what would have happened a few years down the road… could have got messy!