If it's that far off then something is either loose or broken. I would:
1) Remove the scope mount from the rail
2) Remove the action from the stock
3) Check to make sure the pic rail is torqued correctly - I would ask if you've bedded the rail, but it wouldn't cause this kind of error. Still, you should bed the rail regardless if you haven't.
4) Inspect the stock for cracks/damage
5) Reinstall the action into the stock and torque per spec
6) See if it shoots.
Found the issue or issues there may have been two. First the scope is. 15x56 BT SWARO..love that scope for hunting and the ease of dialing general distances within out using/counting clicks. It worked on a 506 yard whitetail last season that I had to get on quickly because of the rut and his constant chasing of a hot doe.
Hated the gun I shot deer with. One shot gun and after that…your lucky to get within 4” at 100. Sold it and kept scope and rings.
Got this gun in Friday and mounted same scope and rings rail I knew was right becuase I put it on the morning with blue loctite to specs recommended and torqued to that. Scope and rings I put on that night. Bubble levels and everything.
Here’s where I started thinking after shooting that it has to be the rings. Before I set scope into rings I notice a white chalky residue on inside of rings. BTW rings are “Nightforce Ultra Lite Extreme Duty”. I just wiped (I thought) the residue off. When about doing everything get scope mounted
correctly. Remembering after a few hours (maybe more) at the range. “that white stuff” I came home and disassembled everything. More white chalky build up and front rings had gripped scope tightly because of that stuff, there was a light rings mark but was able to rub scope enough to get mark completely off. Took rings off and washed them with hot water…after drying the white came back…I took a small razor knife and gently started scraping as not to mess with the lapping already done to the rings. It was crusty micro thin chalky almost aluminum oxidation looking stuff. I do believe it may have been the loctite I had put on the scope the previous season.
Got it all clean and every back to spec.
Also took out action screws and set them to recommend torque whit is 55” lbs…guns is group well now at 200. Not what I want because I need to find the load it real real likes…but now it’s 4” groups at 200 instead of damn near 16. I DID NOT LOCTITE RING CAP SCREWS AGAIN THIS TIME. I just set titanium bolt that mounts to rail to 68”lbs per nightforce. I will be getting this gun bedded, it’s not at all. Floating yes and checked that also to make sure no debris or anything was touching my barrel that I could not see when gun was assembled.