The U.S. Army Tests New Deadly Warheads for Artillery Rockets The U.S. Army is cooking up new warheads for its 227-millimeter artillery rockets Kris Osborn · March 5, 2019 Please leave this field emptyStay Updated with Warrior Maven Subscribe for daily military news and updates delivered straight to your inbox. We don’t spam! Read our privacy policy for more info. Check your inbox or spam folder to confirm your subscription.