Blue Box 6BR Lapua Brass

Discussion in 'Reloading Forum (All Calibers)' started by jbarnwell, Feb 6, 2011.

  1. jbarnwell

    jbarnwell Silver $$ Contributor

    Oct 26, 2010
    What neck wall thickness are you finding on this new Blue Box 6BR Lapua Brass? I have two boxes from the same lot, I am coming up with .012". Having a new reamer ground and would like to stay with the "no turn" neck, but the standard .272 is going to be a little large for this brass.

    Thanks in advance for any help on this.
  2. fdshuster


    Jul 30, 2007
    My .270" no turn neck chambering reamer is working fine with the new blue box Lapua at .012" to .0125" neck walls. If I want to use the older cardboard box, (at .013" to .0135"), I just give them a very light clean up cut, outside neck turning. My loaded rounds are measuring .2675" to .268" with the blue box, and that's the minimum clearence I'm comfortable with.
  3. plinker625

    plinker625 Silver $$ Contributor

    Dec 18, 2005
    Here is the response from Kevin Thomas

    From Kevin Thomas

    Hi XXXX,

    This sounds like some misreading, or a few pieces that were on the high end
    of the spectrum, but no, the thinner brass is here to stay. To clarify that
    a bit, there never was any change of specifications to the brass itself. As
    with any manufacturing process, there are both minimum and maximum
    dimensions for tolerances. The brass that some are now referring to as
    "thick" necks were merely those that ran on the high end of the
    specification. Inevitably, some ran a bit over, and caused problems with our
    loaded ammunition not gaging properly in a the CIP neck gages. As a CIP
    member, this is mandatory for us. As a result, we have had to run the brass
    back to the middle of the tolerance range to ensure that they all pass the
    CIP neck gage. This is the dimension you'll see in ALL future production.
    Incidentally, while these changes took place more or less concurrently with
    our switch to the new blue plastic boxes, there is no correlation between
    the two, and the type of packaging does not guarantee which end of the
    tolerance range the necks will fall into.

    I hope this helps to clarify the situation, but if you have any other
    questions or comments, please feel free to contact us again.

    Kevin Thomas
    Sales & Marketing Manager, SCD CCF
    Nammo Inc. - 123 Winchester Drive, Sedalia, MO 65301
    Tel: 660-826-3232 - Cell: 660-596-2274 - Fax: 660-851-0800
  4. RonAKA


    Apr 16, 2008
    Dave Kiff at PTG has a reamer drawing for the blue box Lapua. See drawing below.

    Attached Files:

  5. jbarnwell

    jbarnwell Silver $$ Contributor

    Oct 26, 2010
    Thanks gentleman, this is exactly the information I was looking for. Have already sent the dummies to Dave Kiff and requested a .270" neck.

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