As others have said I would check that it is sitting correctly in the stock / recoil lug and not over torque it when putting it back in the stock.
I also recently had an issue with a tikka 7mm rem mag after getting a supressor to replace the muzzle break that I’d been using for years.
groups went all over the show Ended up being an issue with the thread, got that sorted and it’s back to shooting great.
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