Centering Pre-Threaded Barrel Up For Chambering
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  1. #1
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    Default Centering Pre-Threaded Barrel Up For Chambering

    I've always installed bare blanks or pre-threaded and short chambered barrels. A customer brought in a pre-threaded but un-chambered carbon barrel the other day. 99% of the time i chamber through the headstock and dial in off the bore at both ends. I dialed in the blank to thread for a brake in the same fashion and after if was dialed in I measured the off of the portion of the tenon that rests under the recoil lug, its off by several thou. I'm sure the threads are off by this much also. I cant recut the threads and I would think its more important for the chamber to be spot on with the bore. I can re-cut the shoulder on the barrel after dialing in which might help. Any suggestions??

  2. #2
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    I’d dial in the bore than true up the shoulder. Keep it simple. Bet it will still outshoot the shooter

  3. #3
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    show the customer, explain the problem,
    explain the time and cost to fix the problem
    re-cut threads and shoulder, by picking up the current thread and re-cutting.

  4. #4
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    Quote Originally Posted by mike in co View Post
    show the customer, explain the problem,
    explain the time and cost to fix the problem
    re-cut threads and shoulder, by picking up the current thread and re-cutting.
    Why pick up the current thread if you are recutting?

  5. #5
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    Dial in the throat and chamber it. The shoulder was cut at the same time as the threads. Anything you do to it in a new set up is going to be less perfect.

  6. #6
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    Dial the bore in, leave the threads alone and make sure the cartridge has a little room in the bolt face.


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