I bought some once fired 9mm brass today and started depriming it. Some of the cases are marked AmmoLand, and inside the case it is "stepped". It's thicker inside around the lower portion of the case. The primers have a rectangular strike mark. I can't even imagine what kind of firing pin, would leave a mark like that. Sorry, I have no pictures at this time. Do I scrap the brass? Or just lightly load it? Anybody have any experience with this stuff?