If you reload a gun with a bullet in the chamber you should be able to shoot magSize+1 rounds before having to reload again. The game right now is not doing that.
Also for KH-2002 assault rifle, the soldier pulls the lever on the left of the gun every time he reloads even when there's a round in the chamber. He should only pull the lever when the chamber is empty. If there's a round in the chamber and lever was pulled the round should eject from the chamber.