Mag Wheel Man, that knurled ring aroung M852 ammo's to indicate it's not for combat as its hollow point Sierra match bullet in it wasn't allowed by the Geneva Conventions at the time. The military had thousands of rounds of M118 match ammo with a FMJBT match bullet in stock that was used in sniper rifles as well as competition. Match 7.62 NATO and .30 caliber ammo has the word MATCH or NM (National Match special lots) indicating it was match ammo.
US Navy Distinguished Marksman Badge 153
Former US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master