I ended up with some 38 Special casings that have a "PPU" headstamp. Attachment 221340
When resizing and attempting to deprime these, the primer almost never comes out. The decapping pin just bulges the primer but it remains in the case. They are Boxer primed.
They do not appear to have crimped primers and when the primer is eventually removed, it shows no sign of being crimped or sealed.
Who make these and why are they such a PITA?