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Just some thing you can check:
If the action screw in rear is too long or too torqued and hits the under side of the rear bolt it will cause drag on the underside of the firing pin assembly (safety indicator bar?)
You can test by moving action screws and then manipulating the bolt to see if it still drags the same without rear screw and verify torque specs after for the action screws
There is a small amount of drag when any of my two tikka’s have upward pressure while moving to rear which I guess is just normal
