You have to verify zero, on paper with supers. Then verify zero on paper with subs. A ballistic calculator can only do so much. It has to be shot for real to know.
Plus there is a thing called "first round pop", and hopefully I am explaining it correctly. A barrel, and more importantly a suppressor, full of baffles and void space are full of air. Air is 21% oxygen, oxygen is a necessary component of fire. The first round fired can land somewhere completely different from each subsequent shot, often higher. Because of more oxygen available, means more muzzle velocity. First round pop happens with my suppressor, and shot number 1 does shift from the rest, but it is slight. I'm only talking supers here. If I load a sub, on in an unshot barrel, the first round pop point of impact shift is more pronounced.
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