While shooting today I had the bolt stick a little. The handle rotated freely, but when I tried to pull it back it stuck. I pulled harder and it came free. I inspected the case, and found a ring indented about .01 from the end of the shell. This was a factory load. I have a couple hundred once fired cases of this same ammo. I inspected them, and found a similar ring on many. I next measured them, and found them to be three thousandths over trim length, and well under listed max length. I've concluded my chamber neck is .01 or so short. I would like second opinions.