Bore sighting isn't an exact science. At best they generally only show the barrel isn't pointing north and the scope west.
I have 31 pieces of 30-30 brass a guy fired last year without putting one hole in his target at 100 yards. He would shoot, adjust the scope, shoot, adjust, shoot. I would have saved him some time and money but he was too busy instructing his two buddies how it sight in a rifle! I don't know if he ever got it sighed in or not. I asked him if I could have the brass and went home.
Bill
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