With my poor recoil skills, 12.5 pound rifles keep them in the kill zone out to 600 yards, 10 pound rifles reach 500 yards, and 8 pound rifles reach 400 yards.
I am counting the weight of the bipod, sling, ammo, and scope.
I shoot most everything from within 50 yards of the truck, but the 8 pound rifle is so much easier to get in and out of the truck.