bigedp51
Below is a Federal 9mm case that has been sized in the Lee carbide sizer die and part of a four die set with FDC and is now resting in a 9mm case gauge.
Below the same Federal case is now resting in the Lee carbide sizer die that it was sized in. Brass springback is holding the case from dropping into the carbide sizing die.
Below the same case is now resting in the Lee factory crimp die and is much lower and resting on the carbide ring.
The carbide ring in the factory crimp die is larger in diameter than the carbide ring in the full length sizing die. The carbide ring in the factory crimp die is for people who hate trimming pistol cases and who over crimp the case. The "LARGER" carbide ring will size down any bulge created while "OVER CRIMPING" the case.
Research on the Lee factory crimp die and "HOW" is works and reading the instructions goes a long way in getting it to work properly. The people who criticize this die are the people who do not have this die and go around repeating what they hear form people who do not know how to use this die.
The Lee factory crimp die will "NOT" size a case again if it is loaded properly and you read the directions. If your loading "OVERSIZED" cast bullets and the seated bullet and case rubs on the factory crimp die carbide ring then do not use the factory crimp die.
Bottom line, if you "OVER CRIMP" the case and bulge the case mouth the carbide sizing ring will size the case mouth again. "OVER CRIMPING" will damage plated and cast bullets and the complainers about this die do not know how to use it properly.

Below the same Federal case is now resting in the Lee carbide sizer die that it was sized in. Brass springback is holding the case from dropping into the carbide sizing die.

Below the same case is now resting in the Lee factory crimp die and is much lower and resting on the carbide ring.

The carbide ring in the factory crimp die is larger in diameter than the carbide ring in the full length sizing die. The carbide ring in the factory crimp die is for people who hate trimming pistol cases and who over crimp the case. The "LARGER" carbide ring will size down any bulge created while "OVER CRIMPING" the case.
Research on the Lee factory crimp die and "HOW" is works and reading the instructions goes a long way in getting it to work properly. The people who criticize this die are the people who do not have this die and go around repeating what they hear form people who do not know how to use this die.
The Lee factory crimp die will "NOT" size a case again if it is loaded properly and you read the directions. If your loading "OVERSIZED" cast bullets and the seated bullet and case rubs on the factory crimp die carbide ring then do not use the factory crimp die.
Bottom line, if you "OVER CRIMP" the case and bulge the case mouth the carbide sizing ring will size the case mouth again. "OVER CRIMPING" will damage plated and cast bullets and the complainers about this die do not know how to use it properly.