50 years shooting, 9 years reloading, never had a problem until yesterday. The rife is Angstadt receiver set, Faxon 16 in. barrel, Faxon bolt, FM buffer & spring. Being new to exploding rounds I need a little reassurance that my take on this is right. Brass was bought new, on it's third reload, but I know brass can go bad at anytime. Bullet did exit barrel, mag was blown out of receiver, no visible damage to bolt, receiver, or chamber. Both pieces of the brass fell 2 feet from where I was standing. I am thinking out of battery, not double charge. Am I right.