The early magazine changes actually was probably related to Call of Duty strategy. People do that all the time in that game ... hange magazines between engagements, even if you’re not quite out, so you don’t get caught reloading during a gunfight.
He probably wore earplugs to protect his ears from the noise. He was still going to kill himself ... he just didn’t want his ears to bleed early.
SnakeDoc
Often called a tactical reload
Or to not hear the screaming of those he killed. How much can he be crazy/mentally ill, if he made such intricate preparations?