"M118", as pictured in post #4, was loaded with a military bullet - a 173 FMJBT.
"M118LR", which I think is what the ammo can on post #1 contains (both because it says "Long Range M118", and also because of the "07" year code) is its replacement. M118LR is loaded with a Sierra 175 HPBT, to nominally the same performance (2550 fps).
(FYI M852 is military ammo loaded with a Sierra 168 HPBT; so back in the days before M118LR, you had the choice of using M852 (very accurate bullet, good to 800 yards but falls apart at 1000 yards) or M118 ("arsenal-match" grade bullet, i.e. not nearly as good as a Sierra) that didn't shoot as accurately but very good aerodynamics, good for 1000y).