If the carbide has a fairly square edge at the bottom, any misalignment of the case can result in the case getting cut/crumpled by the die. This can be felt if you move the ram slowly. If you feel a sudden increase in resistance on the upstroke, STOP. It's probably the case hitting the edge of the die. I've had this happen with every press I own. This is one reason the Dillon carbide dies have a generous taper at the die entrance. The disadvantage of a taper is that they will not size the whole length of a straight walled case. It's a matter of trade-offs. You can put a taper into the die yourself, but it's a real PITA due to the hardness of the carbide.
"Of all the things I've lost, I miss my mind the most." A. Brilliant