Winchester Mod 70 lover myself!!!
You can calibrate the trigger they have so they are around 1.5 - 2 pounds pull.
The barrel must be free floating, and a bedding job will help a lot.
Verify the scope is properly installed.
Concentrate on your shooting technique, and dont rush your shots. Wait between each shot 5 minutes or so letting the barrel cool down.
A bipod and sand bags help a lot.
Reloading for them, and looking for the bullets and velocities your rifles like is another great way to improve their accuracy.
Practice, practice and practice.
There are a lot of different things you can do to get them be better shooters, but the basic things are those. A custom barrel will be much better than a factory barrel, you can have a smith blueprint the action, put a faster spring, etc.....
Hope this helps, safe shooting, and have fun