Factual error: Pete Bailey states he uses a Remington 700 rifle to shoot "roos" (kangaroos). The climactic shootout begins when Jay Swan spots Bailey's truck far across the valley. We see a small puff of smoke just before a shot rings out. Two seconds later Swan is struck by the bullet fired by Bailey. Throughout the gunfight the sound of a shot is heard before the bullet arrives. This also happens during the long-range gunfight between Johnno and Bailey. Bullets fired by a high-power rifle (like the Remington 700) are supersonic so the bullet would arrive before you could hear the shot.
Other mistake: During the climactic gunfight Jay Swan retreats to his car. Using his binoculars Swan looks to the left and slightly rear of his car to see Pete Bailey (who is shooting at him with a high-power rifle). Bailey fires a shot at the car and the bullet strikes the front windshield (an impossibility from that angle).