Factual error: Throughout the entire film the wrong holsters are used. They are wearing "drop loop" holsters but they weren't invented until the 1930s.
Suggested correction: The claim that "drop loop" holsters weren't invented until the 1930s is incorrect. The style often called the "Mexican Loop" (or Mexican Drop-Loop) holster was already in use by the mid-1870s to early 1880s, especially in the American Southwest and northern Mexico. These rigs were worn over cartridge belts and featured loops that secure the holster to the belt. https://cochiseleather.com/western-gun-leather-history.aspx.
Other mistake: When in the tub in Arkansas, Wyatt is bare chested. In bed with Josie he's suddenly sprouted a lush garden of chest hair. (00:48:06 - 02:02:44)
Suggested correction: Him in bed with Josie is over an hour later in the movie, and in the movie time, years have passed. Him going from a young man to a much older adult. Plenty of time to grow out chest hair or decide to stop shaving his chest. He's a much older man by the time he's with Josie.
