I'm trying to get more energy out of my .22 bullboss. It's regulated with a huma set at 155 bar with the port opened to .185 . I'm trying to push the 25.39 monsters to 900 fps. Right now its shooting them at 845 fps. Would increasing the regulator to 165 or even its max at 170 bar get me there. Do I need a longer barrel? it has a 24" barrel now, or is the plume size going to be the limiting factor?