6bra load with 108 Berger, 29in 7.5 twist brux

Discussion in '6BR, 6BR Improved & Wildcats' started by Adrain, Aug 25, 2019.

  1. Adrain

    Adrain

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    Jump or jam the Berger 108s , using h4895 , tried the 107 smks at various loads and jump , jam , at best was a crap shoot , very inconsistent. This is my heavy gun for 600 & 1000 yds, shoots 105s ok, but not giving me that warm fuzzy feeling. custom Howa 1500 blue printed action, 29in brux 7.5 twist , straight 1.250
     
  2. NA Woody

    NA Woody Gold $$ Contributor

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    The 108 Berger is the "easy button". Not finnicky about seating depth. I usually start with 20k off the lands and they shoot so well I just stay there.
     
  3. Adrain

    Adrain

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    Thanks, got some to try, everyone says 6bra is (it) , this one's trying to be a bear
     
  4. swadiver

    swadiver Silver $$ Contributor

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    plus one on easy with the 108's. i shoot 'em 10 to 15 thou off and they are killer @ 600 yds in my straight 6BRs.
     
    Last edited: Aug 25, 2019
  5. Thumper

    Thumper Silver $$ Contributor

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    I shoot the 108's jammed and they love it.
     
  6. Link

    Link Silver $$ Contributor

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    What ogive is the 108 ?
    thanks
     
  7. Adrain

    Adrain

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    Tested the 108 Berger by today, 5 at touch, 5 at 5 thou off ,5at 10 thou off ,5 at 15 thou off , 30.6 gn h4895 not impressed at 250 yds , my 6br shoots smaller groups at 600
     
  8. Rtheurer

    Rtheurer

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    Some times you get a barrel that just wont agg. It happens.
     
  9. Nature Boy

    Nature Boy Gold $$ Contributor

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    Also shooting the 108’s and H4895

    0.005 in and 0.020 off were the two lengths that shot best for me. Settled on 0.020 off
     
  10. Adrain

    Adrain

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    Takes a lot to clean feels rough , carbon out butches bore shine, even used bore polish , looks wavy inside , gonna let my Smith look at it, as you say sometimes get a bad barrel , after 250 rounds it should shoot
     
  11. BartsBullets

    BartsBullets Gold $$ Contributor

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    10 ogive
     
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  12. Jet

    Jet Gold $$ Contributor

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    in a 120FB BRAI I've shot the 108s with 31.4 of Varget with both a hard jam and .005 off touch and they both shot well
     
  13. newbieshooter

    newbieshooter :-) Silver $$ Contributor

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    Sometimes its worth trying further jump distances. I have one barrel that shoots the Berger 108s best jumped .026
     
    Last edited: Aug 26, 2019
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  14. Adrain

    Adrain

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    Tried new test today, put scope down barrel , all good, tested 2 other brands of bullet , wouldn't you know it , one ragged hole at 100 . Figures it would be , Bart's 105 Gungnir , and 103 VT , gun has expensive taste , (If you gonna play you gonna pay)
     
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  15. spclark

    spclark Gold $$ Contributor

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    I shot 105VLD’s for years seated 0.020” off then had a batch I’d seated at 0.060” by mistake (don’t laugh, **it happens!) that shot even better!

    My advice? Try it! You might like it too!
     
  16. Adrain

    Adrain

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    Well have gave up on barrel , tried Sierra 107s, Berger 108s , 105s , nosler 105s , Bart's 105s , vapor trail 103s best group , 2.5in at 250yds , after 250 rounds sent back to Brux , have heard some other people having trouble with 1 in 7.5 twist , Brux sending a new 1 in 8 twist , no charge replacement ,
     
  17. FrankG

    FrankG

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    I doubt it’s the twist.

    Be curious to know what bore and groove size the barrel is?

    I’ve got a 1-7 twist on my gun. I’ve shot 107SMK, 110 Hornady ATIPs and some 105 Hybrids. Forming cases or fire formed cases and accuracy isn’t an issue. Wish I had more of the 110 ATIPs to shoot then what I had.

    Gonna load up some 110 SMK’s this weekend and give those a run also the next time I can get it out.

    Later, Frank
    Bartlein Barrels
     
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  18. Adrain

    Adrain

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    It was a 1 in 7.5 twist .237 bore at 29in long finished 4grove , the one they sending back Is a 1in8 twist 4 Grove .236 bore at 29in when finished . I've had 3 other people say they had problem with 7.5 .237 barrel . Also have a straight 6br 1in 8 twist . 236 bore Krieger that shoots 1.243 groups at 600 when I do my part,
     
    Last edited: Sep 7, 2019
  19. tclaunch

    tclaunch Silver $$ Contributor

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    Brux must have made you a custom tube. They only offer .236" bores to everyone else. .236" is why I buy so many of them.
     
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  20. FrankG

    FrankG

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    We do both .236 and .237 bore 6mm’s.
     
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