Based on my experience reloading and reforming brass rifle cases it agree with LGF. Go incrementally with a good case lube. Not Hornady One Shot. I’d try Imperial Sizing die wax and size 10-15 % then back out and re lube. Not enough wax to cause dents just a thin film to allow the next increment. Apply wax with your fingers to insure a thin, uniform coating. As you do it you will develop a feel for how much to size and how much to lube.