Stuff happens, a buddy of mine had a Smith 57 (.41 Mag) marked M29 (.44 Mag), I had a M18 (.22lr barrel and cylinder) marked M48, and another buddy bought a Colt Combat Commander marked .45 ACP on the slide (and it had a .45 barrel) but the breechface was milled for 9mm/.38 Super.
People work in those plants, and people screw up sometimes. Yours is the first Ruger I've ever seen with a mismarked barrel, but it happens. People ain't perfect.
Edit. I just remembered that the M77R .30/06 I bought had a belted mag extractor on it The hook was too short to be 100% reliable extracting '06 cases. I sent the bolt back and got a new extractor. SO, Ruger DOES screw up now and then. People do that.
Last edited by ratsmacker; 02/29/20.
