Don't buy it or any scope that has predetermined ranges. They are calibrated for a particular barrel, velocity, and bullet weight. You're just going to end up frustrated if you expect any real world accuracy from that scope. Whats your budget? SWFA used to or still does make scopes for the military. Their tried and true SWFA SS Straight 10x is the best bang for your buck around $300. Good glass and is durable. I shot a friends .30-06 with a prostaff scope and i could barely see at 200 yards. Cheap glass. Golden rule is spend 50-70% that you spent on a rifle on a scope.