ok, here is a new primed empty I picked up at SLICS 2015. Anybody have any ideas as to what it is? This is not just a 9x19 case that someone necked down as it is to long. It is also not just an unfinished 9x19 case either as it has a primer seated in it with red sealer. The case neck also appears to have been annealed. Here are the measurements in inches/mm.
Case mouth I.D. = .2825" / 7.18mm
Case mouth O.D. = .312’’ / 7.93mm
Shoulder = .379’’ / 9.61mm
Base = .3865’’ / 9.82mm
Rim = .390’’ / 9.90mm
Shoulder Length = .70’’ / 17.78mm
Case Length = 1.144’’ / 29.06mm
any help would be appreciated.