 It lacked 360° traverse and its muzzle velocity fell behind that of even the old 76 mm AA gun model 1915/1928 (730 m/s).The breech automatic mechanism was failing at elevations higher than 60°, reducing the rate of fire.After initial investigations, the RKKA apparently dropped the idea of using the F-22 as anti-aircraft gun - the gun was never equipped with AA shells and with sights suited for the role.