I have been reloading 9mm rounds all week and it dawned on me that this in is really a .38 caliber round. I am sure everyone else has had this epiphany, I'm a bit slow. Yesterday, I started to reload for the .38 special with a RNFP cast bullet at 158gr weight with a diameter of .358. Sitting next to the box of .38s was a box of 9mm cast bullets with a diameter of .356 with a weight of 100gr. Is it possible to craft a load so that these 9mm cast bullets will fit the case of the 38spl and fired in a 6" barrel. Is the delta of diameter too big and the weight too light and I assume that would be "blow by". Your thoughts!