I took my CVA to the range today to get it fine tuned at 100 yards. After turning my shoulder to what felt like mush I gave up,, but here's the thing. Last time I was at the range it was shooting 1 to 1.5 inch groups today it was all over the place. Same powder sabot and bullet combo. So I switched to a lighter bullet and it seemed to shoot some better but I could not get near the bulls eye. I tried to shoot and clean after every shot, tried to shoot 2 to 3 shots and clean, tried different powder charges (80 to 110 grs. Triple 7 - 2 and 3 f ). Finally gave up with a sore shoulder. Got home and took everything apart to clean it real good and noticed that the front screw on the fore arm stock was loose other than that everything was tight. Would that fore arm screw cause them shots to go all over? Is there some special torque setting for that screw?