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Long Range AR-15 Caliber: Which One?

Discussion in 'Rifle Country' started by gvnwst, Oct 13, 2008.

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  1. gvnwst

    gvnwst Member

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    Hi guys,

    I am in the market for another AR upper, and i want a long range cartridge so i can shoot in matches. (among other things) Other than the 6.5 Grendel, what are some good LR cartridges for the AR-15 platform? I do not want a AR-10, as i already have a '15 lower.

    I'm thinking along the lines of a 6mmAR Turbo, but there is also the WSSM family. If it is a wildcatt, i do not care, as long as it is easily formable. Good excuse to get more equipment too:D Have any advice? Also, any experiance with any of the cartridges would be greatly appreacted.

    Thanks.
    :)
     
  2. shevrock

    shevrock Member

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    isn't .223 a good long range caliber?
     
  3. rrflyer

    rrflyer Member

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    .223 will go to 1,000 with 1/8 twist.

    I believe DPMS makes a .243 and a 260.
     
  4. Jimmie

    Jimmie Member

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    243 and 260 are AR-10s. The Turbo is about as good as any.
     
  5. gvnwst

    gvnwst Member

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    something with a bit better ballistics, less wind drift, ect
     
  6. Armueller2001

    Armueller2001 Member

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    Doesn't .223 lose most of its effective power in a few hundred yards?
     
  7. taliv

    taliv Moderator

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    *cough*


    can you get a 6.5x47 L in an AR?
     
  8. gvnwst

    gvnwst Member

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    i wish. something like 6.5x47 equivilent in a ar (not actual equiv, a "scaled down" version)
     
  9. Deer Hunter

    Deer Hunter Member

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    6.5 Grendel?
     
  10. Z-Michigan

    Z-Michigan Member

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    Most of your cost is in the upper, not the lower. Fully equipped lowers for an AR-15 are only $200 or so, compared to the $500-1000+ cost of a barreled upper with BCG (depending on caliber and quality level). While the interchangeability is neat, IMHO there is little point in buying separate uppers alone vs. just buying complete new rifles.
     
  11. gvnwst

    gvnwst Member

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    i like the interchangability, and the use of the same trigger, ect...
     
  12. gvnwst

    gvnwst Member

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    just wondering if there were more options.
     
  13. rangerruck

    rangerruck Member

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    243, 243 ai, 260, 6x47, 6mmx45(with a long bbl) , 6.5 creedmoor, I think they do it in a 6.5x284 as well...
     
  14. gvnwst

    gvnwst Member

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    other than the 6x45, none of those fit into a AR 15
     
  15. Dr. Tad Hussein Winslow

    Dr. Tad Hussein Winslow member

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    Probably the Olympic in .25 WSSM or .243 WSSM are the best calibers for long-range shooting, particularly the .25 WSSM, *IF* they are accurate - but I don't think they're known for that, so you'd probably have to accurize them. So in reality, rather than in a vacuum based solely on ballistics, a quality 6.5 grendel upper is likely your best bet. But you could run with 6x45mm, 6.8 Rem SPC, 6.5 grendel, .243 WSSM, .25 WSSM - any of those are nice flat shooters without having to delve into crazy bullets and twist rates. At 400 yards or less, I'd just go with a 5.56x45mm.
     
  16. SimpleIsGood229

    SimpleIsGood229 Member

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    I think you'll find the Grendel to be about the best one. I suppose you could neck it down to .224, but that would be a barrel burner.

    I still think 6.5 Grendel is the best option. :)
     
  17. Howard Roark

    Howard Roark Member

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    There is nothing on an AR15 platform that will out perform a 6BR or 6BRX for competition.

    A friend has one that I modified the upper, made and installed a charging handle on the bolt. We have shot this rifle at 300 yards and the groups are fantastic.
     
  18. gvnwst

    gvnwst Member

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    how does the 6mm BRX compare to the 6mmAR turbo 40?
     
  19. Dr. Tad Hussein Winslow

    Dr. Tad Hussein Winslow member

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    Upon reviewing that, I'd have to take Mr. Roark's advice on the 6 BR or 6 BRX - looks good!
     
  20. gvnwst

    gvnwst Member

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    yep. the bigger bolt and modified carrier is looking sweet too
     
  21. Howard Roark

    Howard Roark Member

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    Turbo 40 case water capacity, 38 grains.

    BRX, 43 grains.

    It will push Berger 105 at 3000fps.
     
  22. gvnwst

    gvnwst Member

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    that is .243 levels. in a AR-15!!
     
  23. Howard Roark

    Howard Roark Member

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    The best thing about the 6BRX is that all you have to do to make brass is load a 6BR and pull the trigger. No screwing around with necking up or down and neck turning. Use Lapua brass on the 600 yard line and Rem at 200 and 300 yards.
     
  24. Howard Roark

    Howard Roark Member

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    I played with the 243 WSSM. It's a great round but is a real barrel burner. The BR is much better.
     
  25. gvnwst

    gvnwst Member

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    i have heard other, much worse things about the .243 WSSM... that is why i didn't buy one already.
     
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