Sorting through my never-finished pile of .38 Special brass, when an oddball catches my eye. Look carefully at the round on the left. There's a deep extractor groove, and semi-rimmed. The round on the right is a standard .38 Special for comparison. The headstamp of the round on the left says WESTERN 38 SPL SR, which I assume to be Short Range. The round on the right says WIN NT 38 SPL, which I suppose is the version just prior to WIN 2K, which in itself was a precursor to WIN XP. (Dunno, really, what the NT means, either) Take a look, I'm guessing the left round is a .38 AMU, but I'm open to suggestions:
Headstamps:
Headstamps: