PS: With the low rings I still had to raise the adjustable comb up to get a perfect alignment looking into the eye piece. I think medium rings would be to high. If you use exactly like the ones I used your scope will sit exactly like mine.
Ditto what Joseph said.
I took his advice and used his base/rings set-up for my Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope on my Remington 700 Sendero SF 7mm STW and it works perfect!