German army Leopard 2A6s. DVIDS The longer the barrel in a tank or artillery gun, the more pressure the gun can build up before it ejects its shell. The greater the pressure, the greater the shell’s p...
German army Leopard 2A6s. DVIDS The longer the barrel in a tank or artillery gun, the more pressure the gun can build up before it ejects its shell. The greater the pressure, the greater the shell’s p...