I received a early Christmas gift today in the form of a new rifle scope. It's a Vortex viper 6.5 - 20x44mm PA with the Dead Hold BDC reticle. Looks like it is going to be a nice fit for my 300 win mag. I was wanting to shoot out to 1000 yards with this set up and now I'm am looking for suggestions on what base and rings to use on this scope. Is a 20 MOA rail base the best choice? What are the pros/cons to a 20 MOA rail? Any suggestions are appreciated. Thanks