I would clean your reg and your lpr then see what happens. Your using a high pressure tank correct? Other then that it might help to pick up a spring kit, you should not have to have your ivg screwed in all the way. Are you sure the reg pressure isn't turned up too high so you need even more force to open the valve?
Black Karnivor, Blue/Polished Silver Angel A1 Fly, Red/Blk Vice