Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Can a 1-9 twist barrel handle 77gr HP

Discussion in 'Handloading and Reloading' started by Tank45, Nov 23, 2008.

Thread Status:
Not open for further replies.
  1. Tank45

    Tank45 Member

    Joined:
    Apr 27, 2008
    Messages:
    43
    I recently purchased some 77gr Noslers for a rifle that had a 1-7 twist. The problem is that I sold the gun and now don't know what to do with the bullets. I guess my big question is, are these bullets a waste of powder and primers in a 1-9 barrel?
     
  2. R00KIE

    R00KIE Member

    Joined:
    Nov 18, 2008
    Messages:
    59
    Location:
    ARIZONA
    AR-15 I am guessing . . . 223/5.56??
     
  3. MMCSRET

    MMCSRET Member

    Joined:
    Feb 18, 2008
    Messages:
    2,971
    Location:
    North Central Montana, across the Wide Missouri
    Good question, my Savage is 1-9 and I would like to know before trying.
     
  4. WardenWolf

    WardenWolf member

    Joined:
    Nov 11, 2008
    Messages:
    5,884
    Location:
    Northern Virginia
    1-9 is good for up to 62 grain. Anything above that needs a tighter twist rate.
     
  5. Tank45

    Tank45 Member

    Joined:
    Apr 27, 2008
    Messages:
    43
    Yes it is a RRA AR-15. The chamber is 5.56.
     
  6. hithard

    hithard Member

    Joined:
    Apr 22, 2008
    Messages:
    52
    every gun is going to shoot a given bullet different, generally speaking. The true test will be to just do it. Given that you use safe loading practices the worst thing that can happen is bad groups, key hole's, and some spent primers and burned powder.
     
  7. joneb

    joneb Member

    Joined:
    Aug 18, 2005
    Messages:
    3,724
    Location:
    Oregon
    And the barrel length is..............................? Its possible for a 1:9 twist to stabilize a 77gr projectile but the barrel length will need to be at least 24"
     
  8. Tank45

    Tank45 Member

    Joined:
    Apr 27, 2008
    Messages:
    43
    The barrel length is only 16. So what is the heaviest recommended load for a 1-9 16 inch barrel?
     
  9. MMCSRET

    MMCSRET Member

    Joined:
    Feb 18, 2008
    Messages:
    2,971
    Location:
    North Central Montana, across the Wide Missouri
    My Savage is 22", I'll give them a try.
     
  10. AgentAdam

    AgentAdam Member

    Joined:
    Jul 2, 2008
    Messages:
    439
    69 tops. You will never know till you try them though. Some 1/7's will even like the light stuff.
     
  11. jpwilly

    jpwilly Member

    Joined:
    Aug 10, 2007
    Messages:
    3,892
    Location:
    Phoenix AZ
    My DPMS 1-9 twist bbls will keyhole 69gr bullets (at least the Black Hills load I tried).
     
  12. cracked butt

    cracked butt Member

    Joined:
    Jan 3, 2003
    Messages:
    6,986
    Location:
    SE Wisconsin
    Very likely.
     
  13. Seafarer12

    Seafarer12 Member

    Joined:
    Jan 31, 2008
    Messages:
    1,028
    Location:
    Austin, TX
    It would't hurt to try them. All you have to do is load up 10 of them and see how they shoot. My father inlaw's 1-9 likes 75's. The big problem with the heavies is OAL.
     
  14. everallm

    everallm Member

    Joined:
    Jun 6, 2007
    Messages:
    1,504
    As already mentioned your 1:9, 16", MAY shoot SOME 77gr with tolerable accuracy but it really is pushing past the far side of the envelope.

    If it does it will almost certainly be real picky about the powder burn rate, velocity, manufacturer etc etc.

    Try it, but if you want consistency you probably want to stay at 65 and below
     
  15. SSN Vet

    SSN Vet Member

    Joined:
    Jan 3, 2006
    Messages:
    5,775
    Location:
    The Dark Side of the Moon
    I'm getting great results with a 16" 1-9 twist AR and 69 gr. Sierra Match Kings....

    not planning on going heavier....

    I think your over the line....but the proof is in the putting.
     
  16. MCMXI

    MCMXI Member

    Joined:
    Jul 1, 2008
    Messages:
    7,217
    Location:
    NW Montana
    I've been shooting 77 grain SMK HPBT bullets in my Mini-14 which to the best of my knowledge has a 1:9 twist. As for performance, so far it looks promising with 1" groups at 50 yards using 22.5 grains of RL15. I haven't done enough testing to see if that's the best load and I haven't tried 100 yards yet but 77 grain bullets are more accurate in MY Ruger compared to 55 grain bullets that I've shot in the past.

    By the way, my Ruger isn't one of the new models.

    :)
     
  17. kelbro

    kelbro Member

    Joined:
    Nov 11, 2007
    Messages:
    1,264
    Location:
    Desert Southwest
    I have a 1:9 16" DPMS bull that shoots 69gr SMKs, 75gr Hornady BTHPs and Hornady 75gr AMaxes (single-loaded) just fine with Varget and W748.

    Give it a try, you'll never know and you'll only be out a couple of $$ if it doesn't.
     
  18. dagger dog

    dagger dog Member

    Joined:
    Jan 30, 2008
    Messages:
    2,695
    Location:
    SO. IN
    Tank try out stevespages he has a twist calculator that works.
     
  19. RustyFN

    RustyFN Member

    Joined:
    Jul 5, 2006
    Messages:
    3,170
    Location:
    West Virginia
    I shot some 69 grain ammo in my 16" RRA AR15 with 1:9 twist and it shot fine. Don't think you can go much heavier than that in a 1:9.
    Rusty
     
  20. NuJudge

    NuJudge Member

    Joined:
    May 20, 2006
    Messages:
    748
    Location:
    SE Michigan
    My 20" 1:9 shoots 52s great, 69's ok, and really bad with anything heavier.

    CDD
     
  21. Tank45

    Tank45 Member

    Joined:
    Apr 27, 2008
    Messages:
    43
    Thanks a lot for all the advice everybody. I'll just put them back. I'll probably just pick up a 1-7 upper in the near future anyways. Thanks again.
     
  22. jerkface11

    jerkface11 Member

    Joined:
    Oct 27, 2005
    Messages:
    5,498
    Location:
    Arkansas
    I've got a DPMS 16" with a 1:9 twist and it will shoot 69 grain bullets. I doubt it would like anything heavier though.
     
  23. Jaybird78

    Jaybird78 Member

    Joined:
    Jul 9, 2007
    Messages:
    334
    Location:
    Peoples Republik of Illinois
    Try a few and see what happens.

    My 1:9" Savage loves 68gr hornady HPBT

    I have been told that 70gr is the magic cut off for 1:9" barrels.
     
Thread Status:
Not open for further replies.

Share This Page