I will be loading 9mm to start with and is this a die that I need??
No need for an FCD unless you're planning to rough-handle your ammo. I've reloaded thousands of round of 9mm and the flare (if set properly and not over-flaring) is flattened once you seat your bullet. Haven't seen the need to crimp yet since my loaded ammo goes from loading bench to ammo box to range.