My long range varmint gun weighs 13.5 lbs all up. Not real heavy, but it is a chore for me to pack around in the Eberlestock
day pack I use. I like to be able to cover ground when hunting, and most of my hunting is from 9000 to over 12000' elevation.
I like my little 8 lb hunting rifle, but I don't see it as a 1000 yard rifle.
For a big game rifle intended for the ranges you mention, in the terrain I hunt, I am thinking 10 lbs scoped and ready to go.