OK I GIVE UP..what is a 6BRA ?

Discussion in '6BR, 6BR Improved & Wildcats' started by retired, Feb 14, 2018.

  1. retired

    retired

    Joined:
    Dec 17, 2017
    Messages:
    971
    i look in the articles saw nothing.
    did a search here..no definition lots of talk loading shooting
    someone have a pic/print/ description ?
    difference from a 6br and a 6 mm dasher ?
    thanks
     
    Last edited: Feb 14, 2018
  2. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

    Joined:
    Feb 5, 2011
    Messages:
    5,766
    https://www.wheeleraccuracy.com/6-bra
     
  3. BoydAllen

    BoydAllen Gold $$ Contributor

    Joined:
    Jun 13, 2005
    Messages:
    6,626
    It is an improved version of the 6BR with a 40 degree shoulder. Like all improved designs the parent case headspaces at the neck shoulder junction for the fire forming shot. After that it is loaded just like any cartridge, with dies that match the chamber. The A is a reference to AI (Ackley Improved) but not all improved designs were done by Ackley. This one was not, since the case did not exist when during his time.
     
  4. jamesdmock

    jamesdmock Gold $$ Contributor

    Joined:
    Apr 8, 2017
    Messages:
    282
    The middle cartridge is the 6 BRA with the 6 BR on the left and the Dasher on the right. It is a 6mm BR cartridge with a 40 degree shoulder. It is capable of shooting 105 gr bullet ~2925-3000 fps with H4895, Varget, or Re 15 powder. It has the accuracy of the 6 BR and the velocity of the Dasher. Good shooting...James
    DSCF2008.JPG
     
    BartsBullets, boltfluter and JBT like this.
  5. Sniper338

    Sniper338 Silver $$ Contributor

    Joined:
    Aug 14, 2014
    Messages:
    2,276
    whats the diffetence between the 6BRA and the 6BR Tac 40? that onrs got me stumped. sounds like the samething... 6 BRA with a tactical, IE... longer freebore to seat bullets out a tad longer...
     
    Stan Taylor likes this.
  6. tclaunch

    tclaunch Silver $$ Contributor

    Joined:
    Jan 22, 2009
    Messages:
    1,458
    The TAC 40 is just a slightly shorter version of 6 Dasher, with longer neck. The fireform process is the same, false shoulder. The BR ackley headspaces off the br case and is a very easy/friendly process to fireform. I like both cases, the ease to make cases shines with BR ackley, but the TAC 40 especially with so few shooters has certainly made its mark. The TAC 40 currently holds the F-Class midrange National Record. I only have 3 shooters who actually travel to shoot F-Class matches, and those 3 have earned approximately 15 to 20 state titles to my wobbly South Bends credit. I can now say that I took my only 28" BR Ackley barrel out last week and found a place to chronograph some loads. 31.6 gr H4895 hit 2980 with no pressure, 31.8 was slightly past 3000 fps. This in a .236" bore.
     
    Last edited: Feb 15, 2018
    Sniper338 and Stan Taylor like this.
  7. retired

    retired

    Joined:
    Dec 17, 2017
    Messages:
    971
    so i listened to all you mt shooters, built a dasher and now you tell me all i needed was a 40* shoulder on 6 br case!.
    damn a spent a bunch of money.
     
  8. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

    Joined:
    Feb 5, 2011
    Messages:
    5,766
    The dashers not dead. Your fine.
     
    tclaunch and Jet like this.
  9. WVHick

    WVHick Silver $$ Contributor

    Joined:
    Oct 16, 2017
    Messages:
    45
    So the 6 BRA will headspace the same as a 6 BR? 6 BR headspace gauges good to go?
     
  10. tclaunch

    tclaunch Silver $$ Contributor

    Joined:
    Jan 22, 2009
    Messages:
    1,458
    6BR + .002" to .004" crush. Gtg.
     
    Stan Taylor likes this.
  11. WVHick

    WVHick Silver $$ Contributor

    Joined:
    Oct 16, 2017
    Messages:
    45
    Just to make sure I'm absolutely certain, .002" to .004" deeper chamber than a typical 6 BR?

    I ask because .004" is the tolerance between go/no-go gauges, therefore a typical 6 BR chamber could allow the .004" with no accommodations.
     
    Last edited: Feb 15, 2018
  12. tclaunch

    tclaunch Silver $$ Contributor

    Joined:
    Jan 22, 2009
    Messages:
    1,458
    Hold gauge short, not go deeper for resistence closing the bolt on a new 6BR case. Shallower chamber by .002" to .004"
     
    Last edited: Feb 15, 2018
    WVHick and Stan Taylor like this.
  13. mr.big

    mr.big

    Joined:
    May 15, 2014
    Messages:
    1,448
    I think I know what my new 7.5 twist .236 Krieger is gonna be..
     
    comagutsa likes this.
  14. WVHick

    WVHick Silver $$ Contributor

    Joined:
    Oct 16, 2017
    Messages:
    45
    Perfect, thanks.
     
  15. tclaunch

    tclaunch Silver $$ Contributor

    Joined:
    Jan 22, 2009
    Messages:
    1,458
    I'm gonna go out on a limb and say you'll want a slow twist version soon as well!!
     
  16. mr.big

    mr.big

    Joined:
    May 15, 2014
    Messages:
    1,448

    if I had found a 12 twist Krieger first it would have been now,,but since I found a .236 7 1/2 twist Krieger I went ahead with that now so I will have fresh bbls on my short range and long range rifles,,,,
     
  17. kneedtospeed

    kneedtospeed Silver $$ Contributor

    Joined:
    Feb 1, 2014
    Messages:
    257
  18. Rushty

    Rushty Gold $$ Contributor

    Joined:
    Nov 28, 2013
    Messages:
    644
    I do believe she’s BRA-less..!! Not that that’s a bad thing!,.
     
    Stan Taylor and comagutsa like this.
  19. dkhunt14

    dkhunt14

    Joined:
    Jan 15, 2012
    Messages:
    5,154
    I believe she needs a big BRA. Maybe a 338 Lapua size. Matt
     
    Last edited: Feb 16, 2018
  20. boltfluter

    boltfluter Gold $$ Contributor

    Joined:
    Jan 3, 2012
    Messages:
    1,977
    Might need your protective goggles if you get to close to those. I think that would be a risk I would take. Jiggle on. :D:D:eek:

    Paul
     
    Stan Taylor and Rushty like this.

Share This Page