I am not familiar with the Sightron 5-40X56, but I am well acquainted with the March-FX 5-40X56. So, I had to look at the specs of the Sightron SVIII 5-40X56 ID IR ZERO, which I think is the one to which you are referring.
Well, you said you wanted a big dialer, and that Sightron is certainly...