The Army is revising the Abrams technical manuals after accuracy problems with the tank's main gun were found to be caused by worn gun tubes combined with more lethal ammunition, according to program officials. The revision will change the wear values for the service's most lethal tank rounds, a Program Executive Office for Ground Combat Systems spokesman told Inside the Army in a Jan. 26 email. The problem was discovered during a software test in June 2016, and the Army...