How to Zero Daniel Defense A1.5 Iron Sights

Recently picked up the Daniel Defense A1.5 iron sights. From what I've read the two apertures are on a different plane so they each to need to be zeroed for different distances. (The large aperture for 50-200 and the small for 300-600). I know to do the 50 yard zero for the large aperture, but what about the small aperture meant for 300-600 yards?

Thanks.

Zero one and the other should be zeroed.

“Aim small, miss small”.
I zero with the small aperture.

Quote:

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Originally Posted by SideShow Bob

“Aim small, miss small”.
I zero with the small aperture.

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So do I, at 200 yards.