Match-Grade Ammunition
* 7.62 x 51mm M118 Match Grade A 173-grain round.
* 7.62 x 51mm M118LR Long Range A 175-grain round using Sierra MatchKing Hollow Point Boat Tail projectiles.
o 7.62mm M118 Long Range Performance Data:
o Muzzle velocity (nominal): 2,580 f/s (786 m/s)
o Chamber pressure (typical): 52,000 psi (358.6 MPa)
o Action time (max): 4 ms
o Average horizontal spread at 1,000 meters: 10.3 in (0.984 MOA)
o Average vertical spread at 1,000 meters: 14 in (1.337 MOA)[6]
According to JBM Ballistics,[7] using the G7 ballistic coefficient provided by Bryan Litz, the 7.62mm M118 Long Range 7.62x51mm NATO cartridge, when fired at its nominal muzzle velocity of 786 m/s (2,580 ft/s), should have approximately 878 m (960 yd) supersonic range under International Standard Atmosphere conditions at sea level (air density ρ = 1.225 kg/m3).
* 7.62 x 51mm MK 316 MOD 0 Special Ball, Long Range A 175-grain round consisting of Sierra MatchKing Hollow Point Boat Tail projectiles, Federal Cartridge Company match cartridge cases and Gold Medal Match primers and an undisclosed modified extruded propellant. The 7.62 x 51mm MK 316 MOD 0 Special Ball, Long Range cartridges have an accuracy requirement based around 10-round shotgroups.
o The average extreme spread radius for 10-round shotgroups shall be less than or equal to the following values:
o 600 yd: 7.0 in (first Production Lot). This equates to a ≤ 1.1 MOA requirement at 548.6 m.
o 300 yd: 3.5 in (after first Production Lot). This equates to a ≤ 1.1 MOA requirement at 274.3 m.
The maximum muzzle velocity standard deviation is set at 15 ft/s (4.57 m/s). Information published on acceptance tests regarding five MK 316 MOD 0 cartridge production lots indicated a sub 2.4 in at 300 yd performance. This equates to a sub 0.8 MOA performance at 274.3 m for the listed ammunition lots.[8]
