This is going to be a little long winded so bear with me. I juststarted loading for a pair of 338 federals about 5 or 6months ago. Unless I was using FC brass the expander ball didn't even touch on the way back down. I called RCBS and after about 1/2 an hour or so of going over my problem she told me they would send me a new sizer and if that didn't do the trick I was to send the dies and the brass back to them. I didn't have to send them back as the new die works great. The service I recieved was top notch, she seemed to care that I had a problem and promised and did resolve it. Guess whos dies I'm buying in the future, yep RCBS