More than thirty years ago I had Les Bauska in Kalispell, Montana, rebore a pre-war Model 70 in 270 to 9.3X62. It had been horribly neglected, and both the bore and the chamber were dark and pitted. Since the chamber dimensions of the ‘62 are bigger all around than the 270, the rebore cleaned them both up to new metal condition.
The rifle fed, chambered, fired, and extracted perfectly. I would expect yours to do the same. I hunted and killed literally tons of big game with it for years.
It is still being used by my son.
Ted