The guy was nutz.
Maybe he thought he was gonna overheat the 1st upper , then swap them out.
Could be he thought his 44 cap n ball could shoot 44 ammo.
He was a kook , he had been HOSPITALIZED for mental illness , not an outpatient , HOSPITALIZED because he was a DANGER to himself or others.
http://www.cnn.com/2013/06/08/us/california-college-gunmanHe was also no stranger to law enforcement.
Mike