War profiteering did not begin with WWII, it was rampant throughout the Civil War - especially in the Union Army. Poor quality shoes, clothing, food, and yes, gun powder was frequently reported by soldiers at the time and noted by many Civil War authors. I am not familiar with Dave Grossman or his theories, but I would be hesitant to assert that a multiply loaded muzzleloading rifle picked up off a battlefield was due to an innate reluctance by its owner to kill another human being. I tend to agree with most authors who attribute it to (1) poor quality gunpowder and (2) adrenaline/excitement. Basically, under the excitement and stress of battle, the soldier did not realize that the percussion cap had not set up the charge in the rifle and so he just kept loading and capping the rifle until he suddenly realized that the ramrod was not going down as far as it should anymore - so he did what any of us would do, he simply dropped the malfunctioning weapon and picked up one dropped by a fallen comrade. I am not necessarily saying that there were not people who were reluctant to kill, but we should also remember that it was a different time, with different attitudes. Killing to defend the Union was not only viewed as acceptable, but necessary and even heroic.