I had a similar issue with a Savage FP 10 after adjusting the trigger. The solution was simple (and its actually in the manual); once you get the screws started but before fully tightening them down, thump the rifle on the butt pad. This seats the recoil lug. With the recoil lug solid against the stock torque down the action screws. Finally snugging on the forward action screw last.
"I'm your huckleberry."