Thread: Brass issue?

Looks like case head separation to me but a slightly clearer picture would be good.
I'd cut it open with a hack saw just above the ring and have a look what's going on in there.
Do any of your other cases have signs of a light coloured ring in the same area?
You may be oversizing the brass or chamber may be out of spec so might be worth checking with go/no go gauges or get a smith to take a look.