Well I tried to increase the power and had my shot string alll over the place. So after many pellets and lowering the 2nd reg I end up back to where I started. Try, Valve line 4, Macro 16 micro 3.5. First reg 150 second 114 or so. Shoot groups at Macro 16, 15, 14, 13 ,12 until you go to 830...