Well, GGG 7.62 brass is not Berden primed however it has a crimp. So, yes you can pop the primer out but all GGG 7.62x51mm brass has a primer crimp because it is made to military specifications to prevent the primer from backing out during harsh use. So once you de-prime you have to ream out the crimp before reloading, if not you will not be able to insert & properly seat the new primer.....