Randy is a voice of experience that seems to be on point more often than not. Many New reloaders & nearly as many experienced reloaders are sizing their cases more than optimal. See link below & see if this is you. Just hoping to help others extend there brass life. Do not wish to direct anyone to under size there cases just enough should be our goal.
https://www.youtube.com/watch?v=yDE84oOuz0c
https://www.youtube.com/watch?v=yDE84oOuz0c