Being a diehard rifleman, I need a little help with this; A friend posted on another forum that he was left a, .38 S&W revolver and was having a hardtime finding ammo for it. ? is, whats the difference between a plain, .38, and a .38 Special? Are they interchangable? I'm ashamed of myself for not knowing. Or maybe I did know and forgot. LOL. I am getting up there ya know.