Get comfortable with MOA and its mathmatical values. You will find like others have stated you will need to verify, Just a 1%-2% error at 100 yards can mean a missed target at 600 yards. Recently I was working with a less than ideal scope set up that had 1/2 MOA adjustments.
I zeroed the gun at 50 yards as was recommended, all my data said I should be dead on at both 50 yards and 207 yards, Imagine my surprise when I found out I was low and to the right a whole foot when I moved to the line. After some mental gymnastics I realized that even when zeroing at 50 yards you're not giving yourself enough room for error for a reliable zero at a distance.
The rifle which I'm still working on for another match here in less than a month will need re zeroed since I obtained correct rings. I plan on zeroing it at 200 yards first (bore site at 100) and then going to 50 yards and seeing how off I am there. The further shots count more than the close ones, the less you are off at the further distances the more precise you are closer in.