I recently bought a new set of Hornady 243 dies from a member here (I have deleted the PM). I am having problems with a full-length resizer as the case will not fully engage into the die. They are clearly marked 243 Winchester and I have mixed headstamps of brass and none will fully seat the cases. I did clean the dies and lubed the cases before attempting to resize the cases.the brass is from a newer Ruger American rifle with less than 60 rounds down the pipe. Did I miss something here?