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Reamer reuse- same shoulder w/ different bore?

Discussion in 'Gunsmithing and Repairs' started by Elkins45, Oct 25, 2012.

  1. Elkins45

    Elkins45 Senior Member

    Dec 25, 2009
    Northern KY
    So let's say somebody owned a 270 Win reamer but was really cheap. Could he turn a nylon bushing for the throat portion of the reamer and use it to headspace a short chambered barrel in a larger caliber based on the 30/06 case, like maybe a 30/06 or a 35 Whelen?

    Seems plausible, but so do a lot of things that turn out badly.
  2. Jim K

    Jim K Elder

    Dec 31, 2002
    Briefly, no. For one thing, the .270 shoulder is different from the .30-'06. For another, the neck and throat areas of a chamber are critical points and are also cut by the chambering reamer. They would not be properly cut by the small size of the .270 reamer at those points. Buy or rent a .30-'06 reamer and the necessary gauges.

  3. Kp321

    Kp321 Active Member

    Jul 12, 2012
    West Texas
    What you describe is possible using interchangeable pilot reamers. It is common to have reamers that can be used for a "family" of calibers. The base reamer will be for the smallest bore in the family and others use larger pilots. You then use what is termed a combined neck and throat (N&T) reamer to cut the rest of the chamber. This must be very carefully done to keep everything on the same axis. The process can be very successful and will save some $ as the extra pilots and N&T reamers are less expensive than other chamber reamers.
  4. 25cschaefer

    25cschaefer Active Member

    Jan 24, 2011
    Flathead Valley, MT
    I would use steel or brass for the pilot as nylon would flex to much, I think. It is quite common to use different reamers that are in the same family.

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