I have a model 93BTSS purchased about 6 months ago. So far, the best groups I can shoot with it are about 2" at 50 yards and 6" at 100 yds. My club has a 100yd. indoor range, so weather isn't a factor. Ive tried Hornady and Winchester ammo, both with the same results. Gun seems to function nice and smooth, but I can't get very good results. Any clues?