Lots of .308 in the military.
The M60 and M240 series MGs all use 7.62 X 51 mm, more commonly know as .308 Winchester. So do the M14s in use by some special and ceremonial units (I have seen photos of the 3rd Infantry, The Old Guard, in the field with M14s). The M24 sniper rifle also uses .308.
I think that I have seen a few Garands in use aboard ships, but I could be mistaken.