I'm familiar with the story of this rifle, although I've never seen it. It's been owned by the same family for several generations, and was supposedly acquired from the Mexican who claimed he took it out of the Alamo after the battle. This oral history of the rifle has been known for a century or more, but who knows if it's true. As Mike R said, it's hard to believe Bowie carried a rifle of .36 caliber. And, James Bowie never used, or was known to have a middle name or initial. Nor did any of his family have the initials JHB. Of course, that doesn't mean it wasn't his rifle, I just don't think it proves anything.