Ted, I turn the Valve control to even with the forth dash and shroud is still touching."Ted"I don't have a .22 telescopic shrouded barrel for my Impact (yet), but I do know from my own testing that the forth graduation dash is the max for valve control. Anything beyond that is unneeded. So, perhaps, screw it in until it is at least even with that dash, and see if that prevents the two from touching.