i have a shock pump that goes to 400 psi (28 bar)...... its the only pressurizeing tool i have though, so in my sniper nit goes about 2 psi a pump, and it gets ridiculous to pump 125 times for one shot. plus at 200 psi it breaks the sound barrier and gets inaccurate at long range when the dart goes subsonic. also firing anything but an absolutely perfect dart it will explode at the end of the barrel making a noise that sound like a grenade going of.