. The rifle should have no POI shift from the last time you went shooting or from the first shot of the day to the last shot of the day . Thats the theory
Correct. Look at the High Power rifle shooters. The National Match course of fire is 50 rounds. The full course HP match is 80 rounds at distances from 200 (standing) to 600 yards (slow fire prone).
The rifles had better be able to shoot to POA for that many shots.