I have a 338 lapua zeroed at 100. Shot three different loads and with 1/2". Then I go to 200 and it shots 4" high and about an inch to the left. I go back to 100 and it's perfect again. Used a bench to shot from on both 100 and 200. Is there something wrong with the scope. This should be shooting 2 to 3 inch low not high.