re: Sighting in a rifle...Need help

Just look at the ballistics for your round. It will probably show it zeroed at 200 and show the adjustments at other yardages. I shoot a 139 grain hornady in my .280 and it is flat at 200, but about two inches high at 100, then at 300 it is getting close to almost 6 inches in drop. Like I said, just look up the ballistics or they are probably on your box of bullets...