I have an older 110 in .30-06 (left hand, if that matters).
I was taking it apart intending to do some trigger adjustment, and noticed that the barrel locking nut is cracked.
The crack goes all the way through - ie, instead of being a full "O", the nut is a "C".

Couple of questions:
1) Is there a safety issue here?
2) What would be involved in replacing this? I am guessing there is more to it than just screwing it on, especially if this is what determines headspacing.
3) I looked at Numrich and they are sold out of this nut. Any other ideas where I can get one?