There is nothing “miracle” about the shot. Getting those 3 shots into that target zone in that time is actually pretty easy, considering the target was hardly moving (almost no lateral/vertical motion relative to Oswald’s position & view) and well within 200 yards. “JFK Reloaded” lets you try your hand at the scenario, which shows it’s not hard at all.
I only used the term “miracle” because that’s what the conspiracy nuts call it. The History Channel show illustrated for me that the shot was not only feasible, they actually recreated the trajectory that theorists complain was impossible. Very convincing.