I love my model 70 in 7mm rem mag and enjoy reloading for it.
I didn't like the recoil after about 30 to 35 rounds, so i had a limb saver installed.
If it was a 300 win mag or larger it would have to have a muzzle break as well.
I have never seen a Winchester that shoots poorly, I have...
Sounds like its just a crappy rifle, they make them all to time you know.
Soooo. Would you be thinking of selling it?? I never liked fatory loads and it sounds like your rifle and I might just hit it off?