here is an example on how good they are. single sniper. took 2 shots fired at the presidents motorcade which was traveling at over 100 mph. armored cars. the spread between the 2 impacts was less than 2 inch. he got caught so we know it was a single shooter, distance was just over 500 yards. this is the caliber of guys the army has been fighting. they started firing guns as soon as they started walking. shooting comes naturally to them. and therefore the high casualties.
Bit of a raised eyebrow here.