5.56x45mm M855 (BC = .307)
62 grain FMJBT @ 2990 fps = 1231 fpe
V/E/Drop/Drift @ 100m: 2685/992/1.7/0.5
V/E/Drop/Drift @ 200m: 2399/792/0/0.9
V/E/Drop/Drift @ 300m: 2133/626/-7.7/4.6
V/E/Drop/Drift @ 400m: 1885/489/-23.2/8.6
V/E/Drop/Drift @ 500m: 1655/377/-48.4/14.3
5.56x45mm Mk262 MOD 1 (BC = .362)
77 grain HPBT @ 2730 fps = 1274 fpe
V/E/Drop/Drift @ 100m: 2484/1055/2.1/0.4
V/E/Drop/Drift @ 200m: 2252/867/0/1.8
V/E/Drop/Drift @ 300m: 2033/707/-9.0/4.3
V/E/Drop/Drift @ 400m: 1828/571/-26.4/8.1
V/E/Drop/Drift @ 500m: 1636/458/-54.2/13.3
5.45x39mm 5N7 (BC = .282 (est.))
54 grain FMJBT @ 2950 fps = 1043 fpe
V/E/Drop/Drift @ 100m: 2622/824/1.8/0.5
V/E/Drop/Drift @ 200m: 2316/643/0/2.1
V/E/Drop/Drift @ 300m: 2033/495/-8.3/5.1
V/E/Drop/Drift @ 400m: 1772/376/-25.1/9.8
V/E/Drop/Drift @ 500m: 1536/283/-53.0/16.3
7.62x39mm M43 (BC = .270 (est.))
122 grain FMJBT @ 2380 fps = 1546 fpe
V/E/Drop/Drift @ 100m: 2080/1172/3.3/0.7
V/E/Drop/Drift @ 200m: 1804/881/0/3.1
V/E/Drop/Drift @ 300m: 1554/654/-14.1/7.4
V/E/Drop/Drift @ 400m: 1340/486/-42.6/14.2
V/E/Drop/Drift @ 500m: 1172/372/-90.6/23.5
All from 16" barrels, 10 mph crosswind. Ballistic coefficients for the Russian cartridges were estimated using
JBM's drag calculator.
We're talking about grunts with rifles. Most of the time the rifle is going to be more accurate than the person firing it anyway, so the AR vs. AK accuracy argument is largely irrelevant.