US Naval Howitzer MK-6 Dummy RoundThis WWII Style "dummy round" was used as a training round for the US Naval Howitzer. It is true to weight of a reg round, but has no ammunition or anything explosive in it. great for reenactments, collectors or as a display A dummy round or drill round is a round that is completely inert, i. e., contains no primer, propellant, or explosive charge.[1] It is used to check weapon function, and for crew training.[2] Dummy ammunition is distinct from