It was pretty good. They overplayed the “old man” thing. Hamer was just a month or two past 50 when they got Bonnie and Clyde. He wasn’t really retired either. He and bunch of others had quit the Rangers fairly recently in protest of Ma Ferguson.
Go to the dead cops in Grapevine scene. Look at those metal fence posts and how tight that fence was. I’m pretty sure those posts would have been locust or bois d’arc in 1933 and that fence wouldn’t been that tight. And of course, there was the standard movie trope where Bonnie racked the action on a Remington Model 11.
If you were in your 50's in the 1930's you were an old man.
Except that he was in his 40s for most of the time covered in the movie.
