No. The ULT only sits at bottle pressure in a retro valve following a shot. At this time the larger top diameter has full bottle pressure applied to it unlike the classic valve that always has the regulated chamber pressure on its top following a shot. When the on-off is opened and the front chamber is fully charged and ready for a shot, the lower regulated pressure is all that is available and it only applies to the smaller diameter of the pin since that is the size of the hole exiting the lower portion of the on-off assembly. This pressure is the one that is pushing down on the pin and interacting with the sear and trigger rod. Therefore, the trigger force force is the same for both the classic and retro valves, since they operate at the same pressure from a firing point of view.
Originally Posted by The Ritual
Except for the Automag in front, its usually the man behind the equipment that counts.