Imperial Armour Starting in 2015, Forgeworld stopped using the `Volume X' notation, using just Imperial Armour and the title of the book. The rules contained in the following books are no longer valid, having been superseded by later editions of the "Warhammer 40,000" game and other Imperial Armour books. <br> Forge World has also published two Model Masterclass books, which focus on painting the often very large and extensive models they produce: Imperial Armour Imperial Armour is a series of rules supplements to the "Warhammer 40,000" table-top game, along with an associated range of vehicle-size resin model kits. Both are produced by
Imperial units firearms and ammunition. Imperial measures are still used in the description of cartridge types, even when the cartridge is of relatively recent invention (e.g., .204 Ruger, .17 HMR, where the calibre is expressed in decimal fractions of an inch). However, ammunition that is already classified in metric is still kept metric (e.g., 9×19mm). In the manufacture of ammunition, bullet and powder weights are expressed in terms of grains for both metric and imperial cartridges. As in most of the western world, air navigation is based on "nautical" units, e.g., the nautical mile, which is neither imperial nor metric, though altitude