Rifle Scopes R700 Barrel contour for new scope? Ring Height?

uncledog57

Sergeant
Full Member
Minuteman
Aug 19, 2011
355
0
68
Morro Bay, Ca
Ok this is a dumb question? Reading "how to measure for rings" Glen Seekins says you need the barrel contour? So I have a R700 SPS Varmint, which contour do I have? I just know it as a bull barrel?
A Vortex Viper PST 50mm is going on it.
Once again thank you for your help!!