[math teacher]

In my experience it does change the point of impact. Not everything should be tightened down as hard as you can get it either. The tention on the action screws may not be exactly what they were before. They should be torqued to the manufactures specifications. However don't be too quick to change the sight settings. After a few shots it may return to the same point. I used to take my rifle out of its stock after every hunting seqason to treat any hidden rust. When I resighted I would start adjusting after a couple of shots. After a box of cartridges I would have it on and discover that the scope settings were back to where they started. My friends also played that game. Finally we learned not to touch the scope adjustments until three consecutive shots went to the same place. Amazing how long it took us to learn that lesson, but at least we had a lot of fun.