If you shoot plated bullets, before loading any significant amount, do an accuracy test. The Lee carbide crimp die has a sizer ring in it and may resize plated projos. It does not resize FMJs in my experience.
I loaded a small pile of 10mm plated and at 25m half missed a silhouette target and those that hit keyholed.
I did a more controlled test later, different brand of plated, both 9mm and 10mm. The Lee FCD generally tightened up the groups with FMJ/jacketed projos vs non-crimped. The plated generally had a larger group when the Lee FCD was used vs non-crimped.