First time I ever had this experience. I have a Leupold 6.5-20 on a .270 WSM and I was sighting in at 100 yards using 10 power. Shots were 1.5" high, slightly off to the right. I cranked up to 20 power and fired at 200 yards; I hit about 4" to the right. At 300 yards I was about 9 inches to the right. Wind was not an issue and I set the yardage to adjust for paralax at the corresponding location on the optical end. I reset the scope to 10 power and I hit dead on at 300 yards (adjusting for distance, of course). Should I send the scope back to Leupold?