If the level 10 is properly tuned for one on-off it should work for the other unless you are getting a leak in your on-off. You can check the on-off orings by holding in your trigger. If the pressure continues to increase to the point where it pushes the bolt forward and can vent air, then the on-off is leaking. If it doesn't leak or just weeps a bit and then stops, then the on-off is fine. It sounds like it might be choked for air as mentioned.
Originally Posted by halB
Is it resetting immediately following a shot (ie; is the bolt reset and the trigger coming fully forward)? If the trigger rod is touching the trigger even in the forward position, then it could interfere with the recharge of the valve.
Is the bolt spring new?
Except for the Automag in front, its usually the man behind the equipment that counts.