There are some M1 Garands chambered for 7.62x51mm NATO; they’re modern made. I believe IMI makes - or made - them; also, Fulton Armory, too.
http://www.fulton-armory.com/M1-Garand.aspx
That’s cool!
I was thinking, if one was out of 30.06, could you fire .308 out of a Garand?