Very nice work, you do have way too much time on your hands though, thats dedication if you actually did it in 3 hours most definitly!
i think your gonna find the accuracy very hard, theres loads of different variable factors that would affect the accuracy, its easy to do the power, but an accuracy graph would be pointless and of no use, a standing 1 shot to the head will hit home with every weapon i belive whatever the distance as your tests here demonstrate. if you find a helpfull way of showing accuracy then i will be most impressed