Rifle Scopes Unimount + 20MOA rail on 700?

Skyyr

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Full Member
Minuteman
May 25, 2010
105
1
TN
I'm strongly considering putting a high (1.375") Nightforce Unimount (with 20MOA cant) on my 5R so I can use my 3.5-15x50mm NF F1 scope across different rifles if need be.

As far as bases are concerned, would I need a 0MOA rail? Or would the F1 be able to handle a 20MOA rail (for a 40MOA combined downward cant)?

Thanks!