(repro) 91/30 PU sniper rifle initial sighting in and zeroing details ?

[vintage hunter]

how much of what does what.

This is the best info I've come across on zeroing these things.
Don't remember where but I have read that each graduation mark on the windage drum equals 1 mil(3.6'') @ 100 meters but I've never tried it to see.

Mine had to be shimmed to get the windage right and I found that shimming the base .001'' moved POI about 1'' @ 100 meters but this will probably vary from rifle to rifle. Only way I know to determine elevation screw values is fire a group from a steady rest @ 100 meters then turn the screws 1/4 turn, fire another group and measure the shift in POI. Multiply by 4 for a full turn.
As for filing things goes that's how it was done with the originals during set up. Good luck.