on reloading ; i have carbide die for my reloading. Lees' says when you use carbide die you do not need resizing lube, because of a couple of reasons , one is if you use too much it may put a bubble in the case. reason number two, is you just dont need it because carbide is extremely hard, and if it picks up a dirt particle it would or might scratch the die if the dirt particle got between the die and the case, thus have scratches on the rest of your cases that you resize. on another place i read to just use Pledge , the least tiniest bit in rubbing alcohol base, the main reason for being careful using sizing lube is contaminating the powder or primer. and what is the difference between rcbs case lube and lees' resizing lube. thanks for your help if you can help me.