Scope Ring size for Christensen ELR

[BlackDog77]

Hey guys, I figured this might be a good place to ask about rings for a Christensen arms ELR in 7mm Rem Mag with a 20 MOA picatinny rail.

I just ordered one and am most likely going with a Nightforce NX8 2.5-20x50

Would you or anyone know what height rings I should run?

I could get the scope first and stack coins and measure but if someone already has this combo worked out please let me know.

The selection in the photo below was my initial thought but I wanted to make sure the scope caps clear.

 

[wapitibob]

I use nightforce lows on a nightforce 20moa rail with a 56mm nxs and a brux #5 barrel.