You are best if you can get a longer range. However from memory (which is risky) you need to around an inch low to be a little bit high at 100 yards.
If I was you, would probably set the sights an inch high at 100 yards - just as good as dead on for close and gives you the option for a little farther.
Thus one option is get a small black dot that appears to be the width of your front sight at 25 yards.
Use this for an aiming point at 6'oclock (i.e. the dot floats just on front of the front sight.
Adjust you sights so the group center is perfect for windage and about an inch low.
WARNING - from memory, need to check notes and/or a ballistics program.