Need more detail....
How you are shooting- Sandbagged solid rest?
Is it just you that can't get the gun to group? Anybody else take a crack at it?
Are all the screws (action, scope rings/mounts) tight?
The only times I ever had rifles "shooting all over the place" were when there was mechanical sighting issue- one had a loose scope mount and the other had a rear sight that was loose enough in the dovetail that you could push it sideways with light finger pressure- both moved every time the rifles were fired.
TheGolden Rule of Tool Use: "If you don't know what you are doing, DON'T."