I have a pre-66 110 7mm rem mag. I ordered a new 26" Criterion light varmint barrel for it.

I didn't know the pre-66 chamber is recessed and the bolt face is longer. :-[

My question is, can I put a new modern style bolt face on my old bolt and still work in the old action with the new barrel? I read somewhere that the new receivers have a grove machined in them that the pre 66 don't is this true?

Thanks Doug.