Something else that just occurred to me is that rifle like more than likely has a plastic trigger guard, like mine in 308 and depending on the magazine a small sheet steel spacer to index the mag.
If the trigger guard rear screw has been over tightened in a way (cracked-distended) that affects the trigger bow bearing that could be a source of troubles.
My go to hunting rifle for nearly thirty years is a LA 110 package gun that I bedded and replaced the trigger bow with a steel one from a T/C New Englander years and years ago and it made a world of difference.
It likes 150 spitzers in .270 cal very well, never shot 130's very much better.
It is plastic - I'll check.