Looks like I found my tune today. 35 yards no wind. FX Impact M3, .25 caliber, 600mm, DonnyFL Sumo, CF Sleeve FX 34 grain pellets 1st Reg: 150 2nd Reg: 120 Macro: 14 Micro: 3.75 Valve: 4 or 10.59mm Avg Velocity: 887.2 fps Measured 0.3975 inches for a center to center group size of 0.1475...