M1 chamber Qustion????
I have a springfeild with the serial number in the 3740000 range. Shot for the first time today and noticed that there was a ring around spent case about 1/4 away from the top. Didn't think much of it until i saw the second and third and so on. Looked down the chamber and there was a ring about 3/4 down the chamber. My question is what cause that or did it have a sleeve at one point for .308 ? Why i thought that was i held a .308 case next to the 30/06 case and where the ring was match the .308 length. Can anyone tell me why its doing that or was it sleeved?