Just bought a Vortex PST II 5x25x50 30mm tube for the 6.5 whenever it arrives....I tried a search here but I didn't locate an answer. I'm planning on using signature rings. Tried Vortex and Burris and received two different answers. I want to keep it as low as possible. If you've mounted a 30mm tube on a 12FV, what height did you use ?

Thanks