Well, decided to take my FAL and Saiga 12 out to the range today. I decided to change my SHTF carbine to the FAL, from the AR-15, so the FAL picked up the Eotech, and Chinese knock-off(don't judge me lol) 4x magnifier. Settled down at 25 yards to sight in the Eotech. Took about 10rnds to sight in. Everything is all good. So a friend and I move over to play with the Saiga, and stretch the legs on the .308 a little more to 100yds. He finishes a mag at 100yds, and it's still all good. So I settle in behind the rifle and fire off 4 out of the 6rnds in the mag with my friend spotting for me, when on round #5, it happens! Boom! Clank! Sproing!! I am sprayed in the face by powder, and gas!! My friend looks over and we are like "what just happend!". The magazine's floor plate is blown out, the magazine body is bulged, and the last round is inside the spring below the follower. After realizing what happend, I look at the ejection port, and the extractor is gripping the case partially in the chamber and the entire unsupported wall of the case was blown out just above the rim! I extracted the round via charging handle, disassembled the rifle to check the barrel and internals. There was no visible damage to the upper receiver at all! I reassembled her and she went back to firing like nothing ever happend! She ate another 50 rnds or so without a hiccup. My friend was hessitant to fire the rifle again, but after I explained what happened, he was back outshooting me with my own rifle again, lol. These were reloads purchased at a gunshow, but the rifle was filthy and that's what I think bound up the round, causing the out-of-battery detonation. The FAL is one helluva rifle, to take that and keep on ticking! Just a reminder to be careful and take care of your firearms.