All sighting in was done with a machine rest I believe. I think the distance was 25 yards and if different distances were requested, the rear sight was simply adjusted upward the requisite number of clicks.
Great RM and it's good to see Ray Brazille's name in a thread.
He was quite the story teller with a big personality. I met him at a SWCA meeting in Florida and saw him often at gun shows after that.
Dick Burg once told me not to trade horses with Ray or I'd lose my saddle!