I don't mean extremely long; but 4 inches or so. Both .38 and .357 lose a lot of velocity out of 2 inch barrels. I would venture a guess that .38 out of a 4 inch barrel would have more velocity and energy than a .357 with the same bullet weight out of a 2 inch barrel. You never hear of anyone (at least I don't) carrying a 4 inch .38 though; longer barrel autos yes, but .38s-not so much. Why not? I've got a .38 snubby, but I don't really like to shoot it. The barrel flips too much. The ones with longer barrels are much more comfortable to shoot. Am I missing something? Are there any disadvantages to carrying a 4 inch .38 vs a full size 9mm auto that I'm not seeing?