That sucks man.
Savages have a nut on the bolt, usually allen head. Check to make sure that's nice a tight and not backing off. Mine backed off once- something to check.
are you cleaning it tons?? maybe let it get super dirty, like 30+ rds through it without cleaning, I know some peoples rifles like to shoot "dirty"
I had a savage 116 that was a total turd, I tried a variety of ammo, torqueing, switching scopes etc never could make it shoot.. I don't have the heart to sell it to someone else so its now an expensive paper weight...sigh..
Why not rebarrel that paper weight?