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progressive rifling

  1. Late Colt 1851 Navy and Gain-Twist Rifling

    Colt Revolvers
    Does anyone know if Colt ever produced 1851 Navy barrels without progressive rifling? I ask because I recently encountered something of a puzzle. Here's the story: I ran across what at first appeared to be one of the 4th Model 1851 Navy revolvers assembled (possibly as late as the 1940s) from...
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