Well, it is more common when setting up the gun to shoot 12-foot-pounds. Ed designed the gun to open the valve under higher pressure than what would be needed for a 12-foot-pound speed. The gun is engineered with a valve dwell time assuming 90-130 bar of pressure is sitting on top of the valve. Blackpool UK sets the gun up for 12-foot pounds, and they put an anti-tamper device on the HST (I disagree with this practice). If the user changes the regulator or they shoot the gun below 50 bar, this can lead to valve failure because the valve is opened too far. Damage can occur to the valve stem or brass valve guide. The key is to understand your HST and regulator pressure setting. The end user should be allowed to adjust both as needed.