Personally I really like having all my guns at the same zero. Then you dont need to memorize what the holds are for each gun. I zero all red dots at 50m and all scopes at 100m. All my red dots are 3.5-4"+ above the bore. The difference in POI between a high mounted red dot and a classic 2.7" height dot is pretty negligible. At least for the level of precision you'll be shooting a red dot with.