...When expanding and crimping, you need to pull the bullets to make sure you're not breaking the coating, so I'm trying to find the right setting for the expanding and crimping.
Where did you get that?
I loaded up 50 coated and 50 uncoated for a side-by-side in my 9x18. No feed or firing problems with either flavor.
The best advice I can give you about feeding problems is to be very particular about overall length - be sure it's within spec.
It wasn't for feeding/firing issues. I had heard that if you break the coating, you will increase the smoke. Someone can correct me if I'm wrong