Sometime if you have a oversize chamber and the spring loaded plunger in the Rem bolt will push the case to one side in the chamber and make the firing pin strike look off center. You can sometime go to a lighter spring and correct this. I believe if the barrel isn't indicated properly and the chamber cut sightly off center it cause this also. You would be surprised how many rifle have this and still group well. Most of the time you are just worrying for nothing.
