155 MM Howtizer ( Image courtesy- Wikimedia commons/ Author-Jason Long) NAGPUR: The indigenous 155mm artillery guns, made on the lines of the Bofors howitzers procured by Indian Army in the 1980s, will go for the last round of firing trials next month. After successful winter trials in snowbound Sikkim during March, the Ordnance Factory Board (OFB) is now preparing for the summer rounds of Operation Dhanush, as the project has been christened. The tests will be held in June-end and shall continue till July in the Pokhran desert. If everything goes well, this will be the last time these guns will blaze to prove their mettle. However, other tests, which include an evaluation by the directorate general of quality assurance (DGQA) of the Army, will follow before the howitzers are finally inducted. The other tests will not involve test fires however, said a source. A year ago, during the summers trials in August, the barrel of the gun being tested had exploded, pushing back