hatsan air max 25 cal.air hits me in the face when i pull the trigger.

Plug in your fill probe and carefully SLOWLY! crack the tank valve or pump your hand pump or compressor till you hear the gun check valve CLICK! then STOP! Then SLOWLY!!! unscrew the bleed to BARELY! piss the air out till the gun manometer goes down to its max working pressure.

You DON'T unscrew the bleeder nut too much just BARELY till the air starts to SLOWLY QUIETLY hiss out to siphon/capillary action (with AIR instead of liquid)? the overfilled pressure or to degass the gun.