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  • Barrel Liner

    I have lined several barrels with .22 liners from Numrich Arms. I have had good success.
    I decided to try a .17 HMR, and got a Redman liner from Brownells. This liner has a groove machined on one end that they say is the breech end. Grooved section is removed when installing.
    No problem, I am just curious as to what makes one end different than the other???
    Jim H.

  • #2
    Hello
    Is it possibly choked on the muzzle end
    for accuracy.
    yankee1

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    • #3
      I doubt that, as it is cut to length depending on length of barrel. Bore diameter is the same, 0.1675 each end.
      Jim H.

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      • #4
        Gain twist rifling???
        ----------
        Try to make a living, not a killing. -- Utah Phillips
        Don't believe everything you know. -- Bumper sticker
        Everybody is ignorant, only on different subjects. -- Will Rogers
        There are lots of people who mistake their imagination for their memory. - Josh Billings
        Law of Logical Argument - Anything is possible if you don't know what you are talking about.
        Don't own anything you have to feed or paint. - Hood River Blackie

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        • #5
          Could it be used to line up an index mark
          put on the barrel to aid in extractor groove
          positioning of the liner?
          yankee1

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          • #6
            I read of this in very old gunsmithing books, but never seen it.

            I believe it signifies the direction the cutter is pulled from when rifling the bore.....

            IE, it may be "smoother" one direction for bullet passage.

            HB

            ------------------
            NRA Lifetime Member
            NRA Lifetime Member

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            • #7
              Hellbender's got it right.
              I called Redmans and asked.
              He also told me it may not make a difference as it's an unproven theory to him.
              Robert.

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              • #8
                Unproven theory sounds like a good answer. I can handle that. It is button rifled, so it should not matter, might make a bit of difference with cut rifling. I had never seen reference anywhere else in rebarreling literature.
                Jim H.

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                • #9
                  I have seen that reference for cut and button rifled barrels... Benchrest people pay close attention to that too and they are always trying for the best that they get

                  Walt
                  Walt

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                  • #10
                    How is the insert held while it is being rifled? What stops it from rotating while
                    it is resistng the pressure of the rifling
                    device? Seems a groove on the sleeve would
                    be handy to engage a spline on the holding
                    device. As thin as the material is I would
                    not want to clamp it enough to distend the
                    shape or the bore.
                    Just still thinking about it.
                    yankee1

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                    • #11
                      The groove is circumferential. It may be for fixturing or retaining the sleeve while rifling. Numrich may do differently, thus no groove on theirs.
                      Jim H.

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