Is the FCD set so that it touches the shell holder at the top of the stroke? Do you feel much resistance pushing the cartridge through?
I'm surprised to hear you are having chambering issued after running through the FCD. Most who complain say the FCD swages their cast bullet because the sizing ring is too small. In any case, you probably don't need to adjust the crimp as long as you are removing the bell produced by the expander.
Paint a sticking case with magic marker and see where it's draaging in your case gauge.
Proud member of the NRA and Texas State Rifle Association. Registered and active voter.