I have a set of about 400 pieces of LC brass that just will not cooperate with me (6th loading). I just had my gun rebarreled with a match chamber. the old barrel was about as worn out as it can get. I managed to get a case stuck in my die, but it did come out after a little work. the die is still shiney in side, and i am using Lyman's spray lube. I have never had a problem with this brass at all ever. the case will go into the die about 2/3 to 3/4 the way in smoothly and all of a sudden make a popping sound like friction is occuring. I have checked to make sure there is plenty of lube on the case, and the die is clean. Could i have too much lube? or is the brass work hardened too much to use any more?