Neck thickness for 284 shehane

Discussion in 'Big Stuff--7mm, 30 Cal, .338+' started by carlsbad, Jul 4, 2019.

  1. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

    Joined:
    Mar 2, 2013
    Messages:
    2,453
    I'm getting ready to turn a large number of pieces of brass for 284 shehane. Lapua 6.5x284 expanded up. Measures about .0145 after expanding.

    My reamer neck is .317.

    I'm planning to turn to .013" neck, giving a loaded round of a calculated .310 and .007" neck clearance.

    I know this sounds kindo loose but I anneal frequently so I don't anticipate any problems with the necks sealing.

    I had problems with tight neck clearance once on a 6slr that drove me crazy so I like to go loose.

    Anybody have experience that screams "too loose"? I could go to .0135 or so to get a thou back. .014 would probably work.

    --Jerry
     
    dannyjbiggs likes this.
  2. Ringostar

    Ringostar

    Joined:
    Apr 19, 2011
    Messages:
    1,424
    I turn them .0135 with a .317 chamber.
     
  3. Matt P

    Matt P

    Joined:
    Mar 7, 2015
    Messages:
    107
    I personally run, and tell my customer to run at least 0.004" total clearance (0.002/side) on all calibres over 6mm. I have found when less than that, I get unexplained shots out of the group. I find this works very well especially in F Class guns where you're shooting off the ground.
    Matt P
     
  4. Geno C

    Geno C

    Joined:
    Aug 2, 2014
    Messages:
    880
    I run a .307” brass in a .313” chamber. No problems so far
     
  5. Scott Harris

    Scott Harris Gold $$ Contributor

    Joined:
    Aug 28, 2009
    Messages:
    1,835
    We loaded to those exact same dimensions for years: worked great. Now we do no-turns with .320 necks.
     
    rardoin and Rushty like this.
  6. 1shot

    1shot

    Joined:
    Feb 19, 2006
    Messages:
    1,963
    I run these exact dimensions with -0- problems.

    Lloyd
     
    Geno C likes this.
  7. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

    Joined:
    Jan 23, 2014
    Messages:
    1,705
    I would assume all of you are using Lapua's 6.5-284 necked up. Anyone going to give the Peterson 284 brass that was just released a try?
     
  8. Geno C

    Geno C

    Joined:
    Aug 2, 2014
    Messages:
    880
    I run Norma
     
  9. 1shot

    1shot

    Joined:
    Feb 19, 2006
    Messages:
    1,963
    I run Lapua cardboard box, when I run out I’ll be switching to Peterson brass.

    Lloyd
     
  10. rardoin

    rardoin Silver $$ Contributor

    Joined:
    May 13, 2013
    Messages:
    2,283
    I've got almost 4,000 cases of Norma brass. When I run out I'm going to switch to St. Peter's brass. ;)
     
    HTSmith and Geno C like this.
  11. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

    Joined:
    Mar 2, 2013
    Messages:
    2,453
    Right after i ordered 600 lapua, peterson introduced 284 brass. I am using peterson for my 6mm shooting right now.

    Thanks for all the replies. I've got 590 of them to turn but I adapted my neck turner to the lathe and am getting excellent results.

    --Jerry
     

Share This Page