По M73 и M2 цифры из MIL-STD-637A.

Machinegun, 7.62-mm: fixed, M73
Accuracy. . . . . . . . . . . . . . . . . . . . . Nine shots of a 10-round burst shall group within or cut the edge of a 10.8 dia. circle at a range of 100 yards.

Machinegun, caliber .50: Browning, heavy barrel (turret type), M2
Accuracy . . . . . . . . . . . . . . . . . . . . . All shots of a 10-round burst shall group within an 8-inch circle at a 100-foot range when fired from a rigid mount.

А по M85 только "To be inserted when requirement have km fully established"... Может есть у кого-то данные? Я пока как для M2 задал.