Factual error: The movie takes place in 1868, and every guy and his dog are wielding cartridge conversion Army, Navy, and even what appears to be Walker colts. Unfortunately, such conversions were not performed until 1869, after Smith and Wesson's rights to the Rollin White patent expired.
Seraphim Falls (2006)
1 factual error - chronological order
Directed by: David Von Ancken
Starring: Liam Neeson, Pierce Brosnan, Anjelica Huston, Xander Berkeley, Michael Wincott
Continuity mistake: After Pierce Brosnan does the deal for the bullet, Anjelica Huston rides off with his horse attached to her carriage. Only problem is we see the entire exchange, and at no point does anyone tie the horse on.
Gideon: Your sister, she don't take kindly to thieving. There's plenty of time for that when you grow up.