I'm trying to get rings as low as possible with a 1" tube Leupold 6.5x20-40mm with flip covers on a Model 700 Varmint Special with factory heavy varmint barrel. I'm looking at the Talley #930700 which they call a low. The medium #940700 might be needed for cover clearance if I could find a measurement. Talley doesn't show any height dimensions that I can find. Thanks for any help.