This is my first gun. I was going to get an all-metal gun thinking that anything with as much plastic as a Glock would be of cheap quality. I took a leap of faith however and purchased it new for $580. After reading the Glock FAQ, field stripping it to see how it functions, and firing 150 rounds, I'm becoming comfortable with it. The grip is thick; however, it's comfortable and controllable. Compared to what I feel firing a rifle, the recoil of the G21 is soft. After researching the .45 ACP and listening to what people have to say about it, I thought the recoil would be difficult to control, if not painful. I picked up 400 rounds of 230 gr. "fully metal coated" ammo for the range. Does anyone know what the difference and practical difference, if any, between FMJ and FMC?