Originally Posted by
blackdeath1k
My wife uses a 850psi output crossfire tank on her RTPro with level X without a problem. (RTP, retro, emag, x valve all work the exact same). It doesn't have the rt effect my classic rt valve has. But its nothing to shake a stick at. My classic rt on my gun I feed with 850psi from a ninja pro V2 reg. It has more rt than her mag. But it also has a shorter on off pin.
If you have shoot down with a 850psi reg then my guess is its because the reg has poor flow capability. Not so much because of the psi.