Leupold 3x9x40 vxII or a Bushnell 3200 would fit the bill for midrange a little higher and you go VXIII or 4200 bushnell. I would imagine conditions would be severe in that part of the world and you would want something that is proven. ..I am leery of Burris scopes having bought 2 and having lots of problems with them although I am impressed by the newer ones coming out they would be my 3rd choice . You are also dealing with a caliber that doesn't like scopes and will bust an inferior one in a heartbeat. Also consider eye relief that will come in handy with a heavy recoiling rifle.