I found about twenty of these at the range today. It looks to me like they were loaded with black powder by the amount of corrosion on them. It is starline .45 Colt brass, so I would think they were home made. The ones that opened up all of the way look fine, but the ones that are barely open blew the primer half way out of the hole. I am seriously surprised that I didnt find any fingers lying around on the ground. What a waste of good brass.
I did on the other hand make a good haul of useable brass today.