FX bobcat .30 anyone turn up the regulator

I have a .30 bobcat i use to shoot boar, and it almost always takes two shots to the head to kill em. anyone know how high i can turn up the regulator to get more FPS out of this thing?!?!?.. it shoots around 880FPS but i need like 1100 to get through their skulls from 50 yards or more 
I have a compressor so excessive air consumption is not really an issue. I would like to see if it can be cranked to like 200bar