Mine wears that 3-12 Bushnell 30mm with the illuminated reticle. Can't remember what line it is.... But it's as high as you can go without having to adjust parallax... Which is retarded in a hunting rifle. And 3 is good and low. Unless you are bush hunting, then Big Ugly Man has the best suggestion, as anything higher is dumb. Good luck with the cartridge.... I throw 75grn out at just under 4000. It's like hitting deer with lightning. I've never had them take a step, and it's flat to 400....
This one:
http://bushnell.eu/eu/produits/al/riflescopes/trophy-xlt/733126e/
It's a weird one that can be hard to find. It's not a North American offering normally, as they built it for Europe, but it can be found around here. It's not even on Bushnells NA site. But no parallax, 3-12 zoom, mines very clear, 30mm tube, 56mm Bell. I bought it as a cheap placement to later be replaced on my Blaser R93 but it works so well and is so clear, I just kept it. Like Ford, Bushnell sells better stuff in Europe...