Corrected entry: When the T-850 is confronting the T-X in the military compound, when she tries to assassinate the Lt. General, he made a rather poor choice of weapon, an assault rifle, especially when the coffin was filled to the brim with the good stuff.
MGD
4th Aug 2003
Correction: This is hardly a mistake at all, especially not a plot hole. The Terminator was in an enclosed military facility. Using heavy, destructive weapons would've been useless, because the Terminator would've caused more damage to the facility and potentially himself and John and Kate. He chose the right weapon given the situation. Plus, he used a great deal of weaponry against the other machines.