I have a new Ruger Single Seven in 327 Federal Magnum, 3.75" barrel, bird head grips, and fixed sights. Regardless of bullet weight (100 and 78 grains) and regardless of type and amount of powder (Trail Boss, HP-38, H110) and regardless of trigger pull (tip of finger, pad of finger, first knuckle) the gun consistently (with an acceptably tight shot group) shoots an inch to the left at 20 feet. To the unaided eye the front sight post appears to be straight at 90 degrees to the barrel. The front sight post appears to be perfectly aligned with the rear sight groove. And the rear sight groove appears to be perfectly centered. So by appearance I should be should be shooting close to point of aim, but am not. My LCR in 327 has a fixed sight with 2" barrel and shoots perfectly. Frustrating. Is having somebody rotate the barrel the only option? Looking at a canted front sight post will be worse than just simply having to adjust my point of aim. Suggestions?