I'm full length resizing my 308 brass,and after doing that ,I tried to put the brass in my Wilson shell holder for trimming. The case won't fit all the way? It seems the brass has expanded ,just above the rim . I have moved the die (RCBS) up and down ,reread the instructions over and over,and I can't seem to make sense of it. I've had no such problem with my 243 ,or Whelen. A new 308 shell drops right in the holder. What am I not getting about adjusting this die?-- Thanks for your help--Steve