What is the correct sight picture for factory Glock sights with "regular" factory ammo, say something like 9mm Remington UMC?

I'm assuming that you just align the tops of the sights and use the top of the front post as the POA but I'm getting POI = -1.5" at 10y frown

TIA for any help.

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Last edited by alukban; 07/20/15.