The .38 was originally a black powder cartridge. Since black powder doesn't have near the energy per grain of modern powders, you used much more of it compared to modern loads. There will usually be quite a bit of empty space inside a .38/.357 cartridge, even with max loads.
My typical .38 load is 3.3 gr of W231 and a 148 gr DEWC bullet. I can fit four complete charges inside the case.
Last edited by ScottRiqui; February 16, 2012 at 12:13 AM.