I found two weathered inerted 13mm AT rifle cases and after cleaning I noted the different neck crimps.
I have not seen these differences noted before on the forums.
The loaded cartridge shows no mouth crimps. Headstamped P 9 18 T67
The fired cases are both headstamped P 11 18 T67. Look like unfired pulled bullet cases.
One has six small crimp marks. The other has 3 deep slit crimps.
Why would the same last month of production use two different bullet crimps ?