Lapua 6mm Creedmore bushing size?

Discussion in 'Reloading' started by tbrice23, Nov 2, 2018.

  1. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    Anyone using a bushing die for Lapua 6mm Creedmore brass?
    Are you using .270" for two thousandths neck tension?
    If not but using 6CM brass could you measure the case neck wall thickness for me?
    Thanks.
     
  2. Longtooth32

    Longtooth32 Well-Known Member

    Messages:
    492
    Joined:
    Mar 9, 2015

    My Hornady brass is .264 OD .012 brass wall thickness

    Starline brass is .262 OD and .012 brass wall thickness

    ETA, new brass that has not been resized....
     
    Last edited: Nov 2, 2018
  3. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    Thanks.
    That sounds right for Hornady. I'm getting Lapua brass. My Lapua 6BR brass is .0125".
     
  4. Longtooth32

    Longtooth32 Well-Known Member

    Messages:
    492
    Joined:
    Mar 9, 2015

    Im sorry...I just checked my caliper and it was not zeroed...I am getting around .016" for the brass neck thickness for both...
     
  5. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    I measure with a ball micrometer .0125", caliper reads .014".

    I do not trust my calipers for neck thickness.
     
  6. sedancowboy

    sedancowboy Well-Known Member

    Messages:
    120
    Joined:
    Nov 28, 2014
    Nor should anyone else a caliper can not measure the thickness of as small dia brass case.
    For accurate measurement you must use a ball end micrometer.
     
  7. Longtooth32

    Longtooth32 Well-Known Member

    Messages:
    492
    Joined:
    Mar 9, 2015
    Thanks...learned something new today...
     
  8. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    No problem .

    By the way I'm working up loads for my 270wby and 170eol as we speak. The Mcgowen barrel is shooting really good with rl25 at 3190( brand new barrel) and PacNor is re-making the one that was not throated .375".
     
  9. Longtooth32

    Longtooth32 Well-Known Member

    Messages:
    492
    Joined:
    Mar 9, 2015
    When you posted this yesterday, I just got done screwing in my Criterion Match barrel (from Northland Shooters Supply), 1-7 twist, throated, 26", varmint profile, fluted, 6mm CM.

    Working on 110gr SMK loads right now...

    I even have a box of 115gr Bergers to play with...

    Hopefully, I should be able to shoot it tomorrow...
     
    Last edited: Nov 3, 2018
  10. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    Good keep us updated.
     
  11. Longtooth32

    Longtooth32 Well-Known Member

    Messages:
    492
    Joined:
    Mar 9, 2015
    6mm cm.jpg
    You want data...:)

    First 100 rounds through my 6mm CM...what a sweet rifle...

    On our left is working up 110 Sierras,,,

    On our right are 115 Bergers...

    Out of the back of my pick up with almost 20 mph winds rocking and rolling...
     
    Last edited: Nov 4, 2018
  12. MNbogboy

    MNbogboy Well-Known Member

    Messages:
    280
    Joined:
    Jul 14, 2009
    Without a ball Mike you can get real close using this simple way to measure brass thickness with calipers.
    1. Measure OD of neck with a bullet seated in it.
    2. Then subtract bullet diameter (measured, not advertised) from the measured OD neck.
    3. Divide the sum by two. This is your neck wall average thickness.
     
    lancetkenyon likes this.
  13. bigdaddyWSM

    bigdaddyWSM Active Member

    Messages:
    39
    Joined:
    Nov 15, 2009
    I use Gunwerks 6mm creedmoor brass & it was .0145-.0150 thickness, I turn mine to .013 & use the .288 neck bushing for sizing for a .002 grip on bullet.
    CORRECTED!! Above↑ is my 6.5 creedmoor info, my 6mm creedmoor uses a .269 bushing.
    I'm attributing my mistake on not enough coffee. :)
     
    Last edited: Nov 6, 2018
  14. tbrice23

    tbrice23 Well-Known Member

    Messages:
    2,405
    Joined:
    Dec 12, 2012
    .288????? I don't think so.
     
    lancetkenyon likes this.