Hi. I was hoping someone could help me diagnose a problem with my ak. I put about 120 rds through it one day, rapid fire, and on the last mag I had several cartridges that would not fire. I was able to extract them by pulling the charging handle. I noticed that with two rounds that ftf, the bullet had been pushed further back into the cartridge. There were also several rounds that ftf, with no bullet setback, that look to have small chunks gouged out of the case near the rear of the cartridge, long streaks of shaved off metal, and the nose of the bullets are deformed as if rammed into something. The squashed bullet nose sounds like a feed problem, but the gouged metal suggest extraction problems. Could it be both? Are the two problems related, or did two separate things go wrong at once? Does anyone know what caused this and how to fix the problem? It's a wasr gp 10/63 FYI. Ammo was wolf FMJ 123 gr. thanks. Oh ya I'm new to this forum.