Lake City Match has gone thru 3 iterations I know of. First was loaded with their 173 FMJ bullet. Canada bought a batch of this for our sniper use a long time ago.
The 173 varried in quality, depending on lot number and who loaded it. The Lake City plant is operated by civilian contractors. When Olin (Winchester) won the contract, the ammo was loaded with ball powder. When Remington won the contract, the ammo was loaded with extruded (IMR) power. I preferred the Remington flavour.
Then they switched over to the Sierra 168. A lot of military match shooters were pulling the 173 and substituting the 168, so the decision was made to load a better bullet, the Sierra 168 match.
The 168 was designed as a 300 yard bullet with a short boattail. Long range performance, especially in a 308, was poor. The Army then asked Sierra if they could have a better bullet that matched the 173 ballistics.
Sierra made them up a batch of 175's. Basically a 168 with a longer boattail and then this became the new Lake City match ammo. It will work well up to 1000 yards out of a M14.
I recall getting a sample of the Army 175 bullets, and I recall getting a case of the M118. If my memory is correct, the timing of those aquasitions suggests the M118 is the 168 Sierra ammo. You can pull one and verify which you have.
I don't recall the nomaclature of the new match ammo with the 175's.