My experience is that the Powerbelts like small charges. If I drop the powder to 65 or 70 gr 777, they shoot real tight. I was also shooting Buffalo Ball-ets with 45 gr 777 at 50 yards and was putting them almost in the same hole. One thing to consider though: is it the gun that likes small charges, or is it ME that likes small charges? I definetly hold much more still at the shot when I know I'm not getting thumped when I pull that trigger. I would try dropping your powder down, not up. Get some 30gr pellets and mix the two to get different loads. 3/30=90, 1/50&1/30=80. 1/50-2/30=110.