6BRA load data

Discussion in '6BR, 6BR Improved & Wildcats' started by Alex Wheeler, May 6, 2018.

  1. Josh11

    Josh11 Silver $$ Contributor

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    My BRA load is 32.5 grains of Varget and a 107 bullet at 2998. I might try Sierra 110s. I am wondering if I can get them to 2950 or so.
     
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  2. pat fulghum

    pat fulghum ¯\_(".")_/¯ Gold $$ Contributor

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    30.9 H4895
    Berger 105 hybrid jumping .004
    CCI 450

    Bartlien .237 1:8 30”
    My reamer

    picture is 5 shot groups at 300 yards
     
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  3. dimar1492

    dimar1492 Gold $$ Contributor

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    What kind of velocity are you seeing with that load?
     
  4. pat fulghum

    pat fulghum ¯\_(".")_/¯ Gold $$ Contributor

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    IMG_5473.PNG

    I was trying a new lot of powder...
    Old lot was 31.1 @2990 (not shown)
    New lot at 31.1 was 3000 (ES 12 across 10 shots)
    New lot at 30.9 was 2990 (ES 9 across 5 shots).

    This was at 300 yards - 5 shot groups
     
    Last edited: Jun 6, 2018
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  5. Rope2horns

    Rope2horns Norm Harrold Gold $$ Contributor

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    Today I shot a seating depth test fire forming 6brai brass and this little jewel popped up...606yrds 30gr of Varget 105 Berger hybrids .003-.005 in the lands (I'll have to go back and measure to be sure) barrel was chambered by @Cigarcop at KW Precision.

    [​IMG]
    [​IMG]
    [​IMG]
     
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  6. Terry

    Terry Gold $$ Contributor

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    Nice!
     
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  7. Rushty

    Rushty Gold $$ Contributor

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    Gotta be pleased with that...
     
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  8. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

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    Now dont freak out when you have to tune the gun to get it back to shooting that way. For some reason fire form loads can be very forgiving to powder charge. If it does it fire forming, it can do it on formed cases, but now you'll have to find it. Nice shooting.
     
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  9. Curious

    Curious

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    Something to do with softening the pressure spike maybe as the brass will give as it starts to form at the same time as the bullet starts to move?

    This might also explain why running a little extra headspace can be more accurate than less?
     
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  10. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

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    That may be the reason some have tried more sizing in the first place to see what it would do ;)
    And I would agree, I have been meaning to do it, but I think a sine wave target would tell alot while ffing. I am guessing the pressure spike is not sharp enough to get the barrel into the harmonic pattern we are used to seeing.
     
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  11. Rushty

    Rushty Gold $$ Contributor

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    Or maybe something to do with the inherent accuracy of the BR case??
     
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  12. PAPA65

    PAPA65

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    I wonder what Rope2horns is using for a scope to see that little dot at 600 yrds
     
  13. Rope2horns

    Rope2horns Norm Harrold Gold $$ Contributor

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    NF comp and that's a 3/4" black dot on a white background stands out well for me.
     
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  14. Down South

    Down South FTR Junkie Gold $$ Contributor

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    Too much horizontal, go back and rework the load........:p:D........With that load it damn sure ain't the gun's fault if you ain't winning........:D

    Apparantly those beautiful guns Keith builds can shoot to!........:eek::D:cool:
     
  15. Down South

    Down South FTR Junkie Gold $$ Contributor

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    Trying to learn something here as I'm not a 6mm shooter, what is the reason for the uptick in interest for the 6BRA over the Dasher? Is it more accurate etc? For a while everyone was on the Dasher train if I remember correctly.
     
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  16. Dos XX

    Dos XX Russell Myers Gold $$ Contributor

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    The old 4" diameter penny trick, again?

    Strong work right there.
     
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  17. johnnyi

    johnnyi Gold $$ Contributor

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    C’Mon over Jade! You need a 6mm in your life...:) it’s just like the 308 only necked down and shortened a good bit and lots less powder, half the bullet you shoot now, etc... Other than that it’s about 30-40% less per shot to reload.
     
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  18. Down South

    Down South FTR Junkie Gold $$ Contributor

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    If I started shooting one of those little ultra accurate low recoil pop guns I wouldn't wanna shoot my rock chuckin .308s anymore, I'd get spoiled with that pea shooter........:D
     
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  19. Rope2horns

    Rope2horns Norm Harrold Gold $$ Contributor

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    We got plenty of badass's in fopen we don't need another...stay right where your at!! ;);)
     
  20. blaster50

    blaster50

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    I have been having some luck this season with 105gr vlds, br4 primers and 31.4 - 31.5gr of H4895 running low 3000fps. This is on a 28" 0.237 bore 4 grove Krieger with a bore rider throat on a bat 3l action. Brass is holding up very good, I'm on 7 cycles with tight pockets still. 860rds with 0.003" throat growth from after break in. I have been treating the barrel with hbn after every cleaning.
     
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