Question about sighting in an EXPS 2.

[Glock1943]

I just got back from the range and I have a question. As you can see on the pic, I'm almost dead on at 20 yards and low at 7. Which one needs to be the one that is center mass?

 

[fdkay]

Pick a distance to zero.
Some choose 25 yards, others 36 and a few 50.
You'll have mechanical offset on closer range. Better to hit low close, than miss over the top at 50.
Practice short range drills.
If you pump a couple of 55's in someone's gut at 7 yards, it'll be a bad day for them