Thread: Help Tearing rims off when reloading 223

I've reloaded 303,7mm,308,8mm over a period of about 50 years, no problems no issues and I still have all my fingers. Recently my grandson purchased a 223 remington. OK reload , no problems...Wrong, the Lee 223 reloading die set I purchased may have an issue or I am doing something wrong. I keep ripping the case rims off. Never had this problem. The shell holder is a number 4. Dies are stamped .223,I lube the cases sparingly and everything feels OK until I get to neck resizing and then the case parts company with the shell holder and leaves parts of the rim behind, and turns the case into toast.
Any body got any ideas, because I'm about to have a stroke......