I don't think you mean inches, but minutes of angle, which are roughly inches at 100 yards (1.047 inches per moa at 100 yards, twice that at 200, three times that at 300, etc.). Coming up 13 moa from 200 yards to 600 yard is in the ballpark of a correct sight adjustment. But if you fired the gun sighted at 200 yards at the center of a 600 yard target, then you'd find the impact was about 7½ feet low.
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