I don' t much like my RCBS case trimmer. Like others said, it doesn' t trim squarely, when I trim with it, I need to take a little metal off, then rotate the case about 180 degress and retrim. I' v had the cutter set up for the same lenght for about the last year and now that I' ve tried to change the lenght for a different cartridge, the adjustment collar has seized up on me. I can move the entire adjustment assembly by loosening and retightening the set screw, but I can no longer make fine adjustments I' m going to give the lee system a try next.