 1906 was Moreaux's most successful year in sport shooting.In shooting at the 1906 Intercalated Games he entered in ten different categories, winning a total of five Olympic medals including his first gold medals.He won two gold medals in the 20m duelling pistol and in the 200 metre army rifle, a silver medal in the 25 metres firearm, and two bronze medals in the Free Rifle Free Position and the Free Rifle Team.