It would be close enough for government work.

Obviously lots of factors involved. Assuming returning the scope to the receiver is repeatable it really should be pretty close. While it isn?t quite apples to apples, I have pulled optics off of an AR, put it back on later, and no adjustment was necessary. I also have a take down rifle that I can pop the barrel on and off and the optic stays with the receiver. It doesn?t lose zero from removing and reinstalling the barrel. Granted, none of my examples are ?sniper? rifles.