Loose ammo: Without trying to read the headstamps? Sure it might be a dumb question, but some of us will end up with plenty of loose rounds in those plastic tool boxes which hold gun gear. One or two of us are equally new to both chamberings. My 40 brass appears just a mm or so longer than my 9mm, when both rounds are available for comparison. I have no idea what most bullets' lengths are like, but just ordered 1,000 Tula for each type. Maybe the bullets (the projectiles-not the steel cases) don't resemble each other.