6BR twist rates?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Hunter2678, Jul 20, 2012.

  1. Hunter2678

    Hunter2678 Well-Known Member

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    Just some quick questions and input from the 6br crowd. I'm going to re-barrel my 22-250 in a 6br and was curious if anyone has any experience running lighter bullets 75-85 gns in an 8 twist barrel. I'm in the process of ordering a kreiger 1 inch bull at least 28 inches most likely w/an 8 twist and am on the fence between a 9 or 8 twist.

    Is that 8 too fast of a twist to choke out the lighter weight bullets in that 75-85 gn range?

    Obviously the 8 twist is for running the 105-108s but Id like to have the right balance to run a lighter varmint style bullet without hamstringing velocity too much as well. I want to run the lighter varmint rounds for varmint use and then have the ability to run the 95+ gners for the windy days

    Thanks.
     
  2. Broz

    Broz Well-Known Member

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    My 8 twist, 28" Kreiger tube in 6br shoots 87 gr V-max 's into bug holes.

    Jeff
     

  3. Hunter2678

    Hunter2678 Well-Known Member

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    Velocity range?...Varget? 4895?
     
  4. Broz

    Broz Well-Known Member

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    Varget, and can't remember the velocity as I setteled on the 107 SMK's for their better BC. The 107's are at 2773 fps and are awesome way out there. Taken small deer, anteope and yotes to 650 yds. Wife shot 5 into 4" at 1000 yards.

    Jeff
     
  5. Greyfox

    Greyfox Well-Known Member

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    Over a dozen of the guys I shoot with have 6BR's, I have a 6AR. They are hard core bench rest shooters and any group larger than a bughole is cause for wrist cutting. All of the have 1:8 twist and shoot the light bullets as well as the 107's. Both light and heavy bullets win matches. Just about all use Krieger barrels, Lapua brass, CCI Match primers, Vitavouri powder, most, but not all use Bergers..I personally use an AR with a Whitely 6mmAR that is a necked down 6.5 Grendle. 1:8 twist and shoots 87-107's into .25". I'm partial to 107's for the same reason Broz is.
     
  6. Mikecr

    Mikecr Well-Known Member

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    I use an 8tw with 95vld for groundhogs. I think you'd be good to go in 8tw.
     
  7. Hunter2678

    Hunter2678 Well-Known Member

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    good info, thats what I was hoping to hear...thanks Broz/Grey
     
  8. vulpes vulpes

    vulpes vulpes Member

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    I have a 1in8 Pac-Nor on my Rem 700 custom it shoots both 85gr Gamekings and 87gr Vmax into .1-.2" at 100yds, and are good out to 400yds but at 500yds 105 vlds and 107 mks take over.
     
  9. Hunter2678

    Hunter2678 Well-Known Member

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    You guys shooting VLDs...hows your 100/200 yds groups?..are they stabilizing the bullets that fast or are they starting to get thier act together around 300+ yds?
     
  10. rscott5028

    rscott5028 Well-Known Member

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    my 1:8 twist bartlien 6br shoots very accurate with 80 up to 107's

    it does well with the 105 hunting vld @ 100-500yds
    although 1:8 and 105's isn't the ideal 100-200 yd benchrest setup

    i settled on the 107 smk for long range paper/steel out to 1k

    my son has taken a few deer and hogs with the 107's

    if hunting was the primary purpose, i'd probably go with bergers

    for a multi-purpose rifle, I'd rather be a little fast on the twist than too slow

    -- richard
     
  11. Hunter2678

    Hunter2678 Well-Known Member

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    Well lady luck shone on my hairy white azz yesterday bc I was able to snag a Kreiger #11 contour, 8 twist, 29in 6mm blank on midway that will be here tomorrow...& about 30 mins after I called in my order they showd the item as sold out and next avail. date being 12/6/12...