Thread: Brass issue?

Hey lads

Below is a picture of my 9.3x62 brass, the case is obviously a rimless design however, at the base you can see a prominent ring at the bottom which looks like a belt. The brass has been fired no more than three times and is full length sized. My mate and I were discussing this and we came up with two possibles causes:

1. Beginning of case head separation
2. I am not fully sizing the brass properly.

Any input appreciated