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Trying to identify caliber of single shot rifle

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  • Trying to identify caliber of single shot rifle

    Acquired a single shot rifle with barrel stamped Norm Joseph and a serial number. Appears to be a Falling Block Rifle Works from Rochester, Michigan from the stamping on the action. A 45-70 new case chambers in breech and ejects fine also. Is anyone familiar with this rifle maker, and is there an easy way other than a chamber casting to find out the caliber? Bore ID at muzzle is .451 using calipers.

    Any help appreciated.

  • #2
    It's most likely a 45-70, 90, or 110 if it is a straight walled rimmed case (45-70 can be fired in any of these); also possibly 458 Winchester Magnum if the chamber indicates a belt. Usually there are caliber markings on the barrel.
    The most certain way to find out is to make a chamber cast with a low temperature casting metal, available from Dixie Gun Works among others.


    • #3
      "Nobody cares until somebody loses an eye...", was always what I heard growing up. Well, anything short of a chamber cast just might get back to my youth...


      • #4
        Chamber cast. if you don't have cerrosafe, use sulphur.