I was shooting my 223 today and fired a normal hand load as I always do with the gun and had done the previous 75 shots today. I felt a little almost blast back on my face as I fired it though. I opened the bolt and inspected the case, looked fine to me. I closed the bolt and noticed it would not go into the cocked position. I kept manipulating the bolt and every time it was like I was holding the trigger down. I put it on safe and closed the bolt, it went into cocked position, I took it off safe and it was like pulling the trigger. Anyone ever experience this? Nothing looks broke and no weird wear on anything. I took the 223 bolt and threw it in my 308, it worked fine. I put my 308 bolt into the 223 and again it would not go to a cocked position. Any ideas?