I have had the same problem, I have also read threads on other forums with the exact same problem, I have the same rifle, I think it has to do with the chamber myself, I have tried several types of ammo with the same results
If you haven't had an issue with the gun before I would certainly look to the brass....winchester seems to be having issues in that regard for a while now....only bright spot is the brass is throw away anyway. For interest sake was the ammo just bought or was it some older supply?
I have had the same problem, I have also read threads on other forums with the exact same problem, I have the same rifle, I think it has to do with the chamber myself, I have tried several types of ammo with the same results
I'd be tempted to time or mark the brass to see if the brass splits in the same area
or whether the splits are random?



























