In the Triple-A PPC, by clicking the mouse in the center of the screen
where the option for the Center Canopy is located (apx. 2 box from the
right of the speed shots in the middle), your dollars will turn into
negative numbers and at this point you can load up as much ammunition that
you want with any weapon and any defense. Good idea would be to increase
overall equipment shots percentage.
Once you have completed one round your money for ammunition will go to
zero and then afterwards will start adding back up in positive numbers.