I like the looks of that 10x mil/quad.

So I know next to nothing about the target knob scopes and the mil quad scopes.

I assume they function silmilar to a peep sight i.e. Where you can zero it for 100 yards and lock it down. Then with practice and chosen load shoot to let's say 500 yards then make a note of how many clicks from 100, 200,300,400,500 and so on.

Thanks for sharing your knowledge.