Thread: What the hell is going on here then???

Greetings All,
I was sorting through some of my fired .303 brass to see if any looked like those in the opening post. Some did a little and then I spotted this.

The bright line not far up from the case head is called an incipient head separation. It is where the brass cracks from the inside due to repeated stretching. If the case was loaded again the case would snap in two leaving the front portion in the chamber. It is caused by repeated full length resizing the case after full power loads. It is one reason why .303 shooters often only neck size, keep the loads at the lighter end and check cases carefully inside and out at each load. The case is a CAC likely close to 50 years old. Should really through them out.
Regards Grandpamac.