TexasCHLforum.com

I think the issue with open carrying a long rifle in Texas is disorderly conduct, which is subjective. The consideration would be why are you carrying the long rifle?

Texas Penal Code 42.01 Disorderly Conduct. (a) A person commits an offense if he intentionally or knowingly (8) displays a firearm or other deadly weapon in a public place in a manner calculated to alarm; (c) for purposes of this section: (1) an act is deemed to occur in a public place or near a private residence if it produces its offensive or proscribed consequences in the public place or near a private residence.