I'm having a problem that I haven't had before and I have loaded only about 1200 rifle rounds. I'm trying to bump the shoulder back 2 thou with a FL sizing die. I can only get it bumped back 1 thou. The cartridge is 300 win mag, RCBS FL sizing die, Lee press, RCBS shell holder. Normally I can bump the shoulder back as much as I want to : 2 to 5 thou. I've tried resetting the die until it just touches the shell holder with the ram all the way up and then rotating the die 1/16 to 1/8 turns at a time after sizing a cartridge. Still will only bump the shoulder back 1 thou. I've gone 3/8 of a turn and the ram won't hardly cam over, but still only 1 thou of shoulder bump. I've tried several different cartridges and still only 1 thou. Maybe I'm doing something dumb, but I don't know what it is. HELP! Thanks.