Here is what I do
boresight by looking down barrel
fire 1 shot @ ~100 yds and move crosshairs to ~1" below bullet hole
move back to 200 yds and shoot 1 shot
depending on how close the POI is to the POA either move crosshairs to POI if greater than 3" then fire 3 shot group to fine tune , but if within 3" fire 2 shots and move cross hairs to center of group.
Shoot group to confirm zero.
Check zero the next day or after the rifle has had time to cool down completely.
I don't shoot groups if I am very far from my zero because I am better at shooting than I am at making adjustments without moving the rifle.