Chamber neck question

Discussion in 'Gunsmithing' started by Idaho_Elk_Huntr, Mar 7, 2010.

  1. Idaho_Elk_Huntr

    Idaho_Elk_Huntr Well-Known Member

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    My loaded rounds measure .310. How tight can the chamber neck be to just get by without turning brass necks??
     
  2. winmagman

    winmagman Well-Known Member

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    Just my opinion, but I would want .313 as an absolute minimum would prefer .314 or .315. Now that's in an "out in the elements" hunting rig, in a "from the bench only" rig I'd be much less concerned with dirt and moisture in the chamber and could tolerate .312 or .313 with a little more comfort.

    Chris
     

  3. Idaho_Elk_Huntr

    Idaho_Elk_Huntr Well-Known Member

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    I was just told that .316 is as tight as they can go. Is this 2 much?
     
  4. Idaho_Elk_Huntr

    Idaho_Elk_Huntr Well-Known Member

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    I was just told that .316 is as tight as they can go. Is this 2 much? not enough?
     
  5. Savagebien

    Savagebien Well-Known Member

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    i chambered my 6br with a .272 nk reamer, loaded rounds measure .269, and i have no problems with it, so .313 or so should be fine.
     
  6. winmagman

    winmagman Well-Known Member

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    If that is as tight as they can go....unfortunately thats what you get.

    I don't know for certain, but I doubt .003 on a side would be detrimental, just maybe not optimal depending on the intended use.

    I'd bet there are factory chambers with more clearance than that out there.

    Chris
     
  7. NesikaChad

    NesikaChad Well-Known Member

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    My rules:

    Rifles used in sterile/controlled settings:

    No less than .0015" per side

    Service guns:

    No less than .0025 per side

    You have to have room for the neck to expand to release the bullet. Failure to do so will result in more accuracy/pressure "fits" than if you just left the dern things alone and ran a SAAMI neck to start with.