Hey, I bought myself a Vortex Viper 4-16x50 HS. I'll be getting my Savage Model 16 270 WSM in a couple of weeks. want to mount it using the Burris Signature Zee 420588 rings and a EGW Savage Picatinny Tactical Rail Scope mount 0MOA 41200. My question is which height rings do I need to go with, medium, high or extra high?