If you live close to a kill plant you might try there. Sometimes they will give them away for free. I made a powder horn for my muzzleloader from a beautiful black with white stripes horn. It was plenty long so I even made a bullet container from the base. Just do as the above poster said about polishing it. These things are fantastic when polished. American bison is black. Domestic beef comes in different colors depending on the breed of animal. A Texas Longhorn will give you plenty of stock for other projects.
