For those of you interested in continuing with the analysis, the typical 50-cal round had about 14.5 grams of powder in it. If you add that, you might affect the 3rd or 4th decimal place. Go for it.
Mike brings up an important point. Recorded history is usually the viewpoint of the victor. That is, the viewpoint of the loser is almost always lost to posterity since the people writing the history texts must usually deal with the winning side when they publish their books. If they stray too far from what has been said by the people in power, then their text is almost never adopted by schools or bought widely. A true historian might not care, but most textbook writers aren't able to ignore possible sales.
I have a history text written only 4 years after the US Civil War and it is completely different from what is being taught in schools today. If you were to read a modern version and then the book written at the time, you'd swear they were talking about two different conflicts.
To me, personal accounts are the recollections of someone who was there and must be viewed as such. Never mind the overall battle, their recollections are of the events that happened to them. They are mostly true with the bad parts somewhat exaggerated and the good parts also somewhat exaggerated, but essentially true accounts of what they saw. Most of the exaggeration comes for the fog of time, not from a desire to make it sound better.
I've heard maybe 100 former WWII pilots talk about WWII over the time I've been at the Planes of Fame Museum, and their stories are vivid, with little quarter given or asked. Some mentioned the strain of fear of having missed some enemy who was stalking you in combat since it was usually the guy you didn't see who killed you. Some didn't mention any combat stress at all. A couple mentioned the unreal sensation of bailing out of a plane going down as one of the most memorable experiences of their lifetime, particularly about the time it came to pull the ripcord. Both of these gents worried about being shot at while hanging in their parachutes and neither actually was shot at. One said the German who got him flew past and waved.
I got the distinct impression they hated the enemy while fighting him, but if they won and he bailed out, he became a man again and they left him alone in his parachute. That is, the man and aircraft together were despised, but once separated, they were just a plane and a guy. Whether or not they continued hating him when he was out of the plane depended largely on whether or not he had just killed one of your best friends or not.