Vudoo Piccatiney Rail - Which One?

10 MRAD (about 35 MOA) down travel in your scope.
So a 25MOA rail will still leave 10 MOA down travel and give you plenty of up (60 MOA ) to dial to 350 plus yards.
A 30 MOA would work, but close to the edge of the adjustment range can make funny stuff happen in a scope.