On the subject of bullet placement, an historical example that I first read about as a child comes to mind.
"An officer, who especially prided himself in his pistol-shooting, was attacked by a stalwart mutineer armed with a heavy sword. The officer, unfortunately for himself, carried a Colt's Navy pistol of small caliber and fired a sharp-pointed bullet of sixty to the pound and a heavy charge of powder, its range being 600 yards, as I have frequently proved. This he proceeded to empty into the Sepoy as soon as he advanced, but, having done so, he waited just one second too long to see the effect of his shooting, and was cloven to the teeth by his antagonist, who then dropped down and died beside him. My informant, who witnessed the affair, told me that five out of the six bullets had struck the Sepoy close together in the chest, and all had passed through him and out of the back."
I figured that was an example of good bullet placement, but I have met many people on the internet that, in that Officers position, they would have just shot the Sepoy through the head-one well placed shot with 5 shots left to deal with other enemies. I'm not so cool under pressure and most likely would have aimed for the chest too, it being the bigger target. I hold the Colt's Navy Pistol in high regard, but offer it as an unbiased example of a situation where "more" probably would have been better.