With the changes occurred in warfare we can't rely on similar calculations, estimations, we left with subjective observations of the participants.
We get stuff like this:
In many circumstances highly trained modern soldiers have fought poorly trained guerrilla forces, and the tendency of poorly prepared forces to instinctively engage in posturing mechanisms (such as firing high) has given a significant advantage to the more highly trained force. Jack Thompson, a Rhodesian veteran, observed this process in combat against untrained forces. In Rhodesia, says Thompson, their immediate action drill was to "shed our packs and assault into the fire . . . always. That was because the [guerrillas] were not able to deliver effective fire, and their bullets went high. We would quickly establish fire superiority, and rarely ever lost a man."

One of the best examples of an intentional miss was the experience of my grandfather John, who had been assigned to a firing squad during World War I. A major source of pride from his days as a veteran was that he was able to not kill while a member of that firing squad. He knew that the commands would be "Ready, aim, fire," and he knew that if he aimed at the prisoner on the command of "aim," he would hit the target he was aiming at on the command of "fire." His response was to aim slightly away from the prisoner on the command of "aim," enabling him to miss when he pulled the trigger on the command of "fire." My grandfather bragged for the rest of his life about outsmarting the army in this manner.