Oops, you are correct, I didn't open the safe and look at the scopes. I said Nightforce but I should have said this one.

http://www.valdada.com/scopes/benchrest-competition-scope/36x42-30mm-sf-benchrest-competition-scope

Anyway, the method will work regardless of my terrible error of not looking at my Nightforces and IORs. Probably means I own too many of each.

Heck you even could use the Nightforce 12-42x56 benchrest model sat at 20 X and 32X for a direct comparision ...... if you owned one.