That is a late production bolt similar to a 325 or 340 correct? I have never owned or shot one yet I have several magazines for one. The junk a guy accumulates.
Introduced in 1950, I believe. Not sure when the 342 ended. Should have a date code stamped on the barrel - circle with 1 or 2 numbers followed by a letter. B = 1950 C = 1951 D = 1952 etc (skipping O and Q)
As you said, pretty plain rifles but mine is very accurate.