Do this now: Close the bolt. Use a small flashlight and shine it on the LH side of the receiver directly behind the rear end of the bolt... Check the guide rail there... IF it shows no-to-little evidence of damage, congrats... But IF you see indented, square-shaped chatter marks about an inch long along that rail, get ready for that rifle to be a single-shot rifle instead of a semi-auto...
Good luck.
yes, mine has very light marks on the rail.
It won't be a high use gun, and I'm using light loads and plan to keep it that way.
Thanks