Dad left a bunch...they're .38 spl Tracer's- National co. Forgive my ignorance, I realize I'm a bit of an "intruder", 'cause I'm not a shooter or collector. Dad was, though, and left me with quite a stash. Some of it I got sorted out(WWI & II stuff, and some Vietnam auto's), but still have boxes of this ammo that doesn't fit with the rest. It's no where near as old, yet the shells look longer than most .38's I've seen.