I confess that I also occasionally carry a 38 S&W revolver. The ammo I typically carry though is some FN 380 2Z ball ammo of which I bought a boat load of a few years ago. OK, maybe it was a few decades ago. I plan on testing the velocity of some of these while I'm at it. I also have some old stock factory and some new production factory I plan on testing this weekend. The old factory ammo literature list the 146 gn 38 S&W load at close to 750 fps and 173fp of energy. The new ammo is listed at 680 fps and 150 fps of energy. I'm curious to see if the old stuff is really faster. In my mind a 38 S&W lead bullet generating 173 fp of energy has the practice effectiveness of 380 ball ammo. If that proves true it's no wonder so many revolvers were made in 38 S&W pre WW2. Same logic behind all the 380 semi- autos being sold now.