1000 yards is very do-able with most factory guns... It is far enough that wind is a issue and needs to be accounted for- but not so far that you have to be a wind expert (unless you need first round hits).

If it is a decent shooting gun and you have the ability to spot misses you can generally walk the rounds in.

As mentioned the scope is very important- as well as consistent ammo- and by that I don't mean small groups at 100 yards. You need ammo that has consistent muzzle velocity and a consistent bullet that is going to act the same as the last one you just shot- so you can make changes and have those changes matter. With inconsistent ammo you really find yourself chasing your tail-

The factory stock is not the best option for longer range- but if you want to keep it your hunting rifle then you can probably make it work.

Do you have good fundamentals? (not that you need to answer that to me- but we all have to be honest with ourselves... if we don't have the basics down then we will see inconsistencies on the target- and blame them on the gun/setup even though we are the problem).

And lastly- have realistic expectations-- Yes, 1000 yards is doable, but still challenging. People train for it and shoot matches all the time, but even then you have your off days and poor results- with top of the line equipment.