One advantage in getting a real refurbished PU is that there is little chance they will need any major change in the settings they left the factory with. They should need no shim nor grind. You may have a factory replica and most of those are roughly factory zeroed with average light ball also.

I bore sight at 100 yds, the old fashion way, bolt out and look down the bore. Adjust the scope to equal the bore picture while keeping the rifle as steady on bags or rest as possible. If you get weird numbers on your scope once this is done you will have a much longer process. If the windage is weird, you may have the big hassle of grind or shim depending. If elevation is odd you can adjust the elevation screws on the mount base so it reads 1 with the bore sight.

Great rifles and well worth owning a real PU while the price is a steal. No other WW2 sniper can be had for less than about ten times as much.