I can’t comment on that model specifically but your thinking is on the right track. Any new regulator is subject to pressure creep so I wouldn’t worry about it just yet. During the break-in period, the seal material (plastic) will take on an imprint of the valve seat, and in turn will be able to halt the transfer of air more promptly. To accelerate the break-in period, the reg benefits more from a mix of cycling and idle dwell time than it does from simply running a bunch of rounds through it in one sitting. So for example, you can dry fire it once every 15 minutes or so...however long it takes to creep up and stop climbing. And simply sitting idle is of some benefit because the plastic seal is pressed against the orifice, taking on a compression set.