Medium or Low rings with this setup????

[Mills]

Just bought a Leupold 3.5-10x40 VariX-III for a rifle I'm having built. Will have a Rem 700 action with a Lilja #2 barrel and I will be using Leupold Dual Dovetail rings. Leupold's website says I can use low rings, but the salesman at Cabela's said lows will absolutely not work without having to push down with my face to see in the scope. Any thoughts? Thanks.