I discovered the 9mm Magnum's existence from making brass for all my 9mm Largo guns. I learned you could cut down the 9mm WinMag brass to make the Largo brass because it wasn't readily available loaded or as brass from Starline yet. Once I knew a 9mm WinMag existed, I just had to have one and wound up with 2 of them, one factory NIB bought right off AMT's shelf, the last one they had and no more were being made. The second I bought used just in case I ever need any spare parts.