Thanks a lot for advice given!

It is a 1950 rifle model, but made after 1952 by the looks of it..

The .30-06 barrel is fine, so might leave as is till I wear out the barrel..
Wore out my last .30-06, before rebarreling it to 6,5x55sm.

A 6,5x65RWS in anything shorter than a 65cm barrel is too loud for me..