What distance should I zero my Eotech?

I have ran red dots for yeas on AR's shooting 5.56mm/.223. I always rand a 50 yds zero which gets me at point of Aim/point of impact out to about 225 yds.

For an Airgun, I think I would zero at 25 yds and then see where my drops are at 10 yds /15yds/20 yds.

Your best dope is the one you make by going out and shooting your airgun and see what works the best for you and the airgun your using, the power and the pellet.