Quantcast

16" Barrel, 1/9 Twist: Which bullet weight to use?

Discussion in 'Handloading and Reloading' started by TheSaint, May 6, 2013.

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

    TheSaint Member

    Joined:
    Apr 20, 2006
    Messages:
    343
    Location:
    The People's Republik Of California
    I just purchased this guy for my first AR build:

    http://www.midwayusa.com/product/83...contour-1-in-9-twist-16-chrome-moly-phosphate

    For a 1/9 twist, 16" barrel, what weight of bullets would you recommend for just your standard plinking? Before I order 4,000 bullets to make my supply chest bulge, I'm just wondering if there's some consensus matching up the barrel to the bullet weight. The barrel arrived from Midway without any documentation or suggested weights, so I'm left to doing research online.

    I was thinking about buying your standard 55 grain FMJ in a smaller quantity and make a few loads that way and see how it handles out on the range. Your thoughts?
     
  2. vujade

    vujade Member

    Joined:
    Nov 8, 2012
    Messages:
    48
    Location:
    TN
    I believe 1/9 twist will stabalize 50-62 grains well.

    I'm an AR newbie and I've only loaded 55 and 62 grain bullets. They are about the same for me - a little less than an inch at 50 yards (but that's not precision shooting. I only have a red dot with the front of the rifle on a sandbag).

    I just picked up a box of 50 grain vmax and hope to load/try that this weekend!
     
  3. 243winxb

    243winxb Member

    Joined:
    Jul 7, 2004
    Messages:
    11,560
    Location:
    USA
    Bullets - Length VS Weight

    69 gr Sierra, 68 gr Hornady is the longest/heavest to light 50 gr work. Its more the length of the bullet that matters. A heavy flat base, round nose bullet may shoot ok, but one at the same weight that is boatail & pointed may not. The velocity also is a big part. The bullet needs RPM's of the correct amount to be accurate also. Short barrels produce less FPS = Less RPM.
     
    Last edited: May 7, 2013
  4. Beentown

    Beentown Member

    Joined:
    Jan 20, 2011
    Messages:
    469
    40-62
     
  5. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,076
    Location:
    Eastern KS
    40 varmint of any brand to 69 grain Match bullets.

    1-9 will shoot just about anything you can stuff in the magazine.

    That is why it has become almost the universal AR-15 rifling twist.

    rc
     
  6. BullfrogKen

    BullfrogKen Moderator Emeritus

    Joined:
    Jul 28, 2005
    Messages:
    14,886
    Location:
    Lewisberry, PA
    Yeah, pretty much up to 69 grains.

    Can't take advantage of 77s though.
     
  7. jim243

    jim243 Member

    Joined:
    Sep 11, 2009
    Messages:
    1,992
    50 grain to 69 grain bullets will work.

    Jim
     
  8. RustyFN

    RustyFN Member

    Joined:
    Jul 5, 2006
    Messages:
    3,169
    Location:
    West Virginia
    For 100 to 200 yards I like 55 garin bullets for punching paper and steel. Over 200 yards I like a heavier bullet. I have shot 69 grain bullets in my 16 inch 1:9 twist with good accuracy.
     
  9. TheSaint

    TheSaint Member

    Joined:
    Apr 20, 2006
    Messages:
    343
    Location:
    The People's Republik Of California
    Thank you all for the advice. I'll probably purchase a small quantity of each of the ranges suggested above and see how they shoot out of my build once it is complete.
     
  10. Fishslayer

    Fishslayer Member

    Joined:
    Jan 1, 2010
    Messages:
    1,974
    Location:
    People's Republik
  11. jack44

    jack44 Member

    Joined:
    Sep 12, 2011
    Messages:
    669
    Location:
    North Woods - Wisconsin
    somewhere around 60 or so gr.
     
  12. Beentown

    Beentown Member

    Joined:
    Jan 20, 2011
    Messages:
    469
  13. balderclev

    balderclev Member

    Joined:
    Mar 30, 2013
    Messages:
    205
    Location:
    Benton, AR
    I've shot commercial loads in everything from 37 to 62 grains with <1MOA in all.
     
  14. squarles67

    squarles67 Member

    Joined:
    Jan 16, 2009
    Messages:
    448
    Location:
    Orange, Texas
    Accuracy in mine goes out the window once you go above 69g
     
  15. Steve in PA

    Steve in PA Member

    Joined:
    Dec 29, 2002
    Messages:
    2,643
    Location:
    NE PA
    I have a Bushmaster 1:9 that shoots 75 grain ammo just fine. It also shoots the 55 grain ammo just as good.

    Try some ammo in various bullet weights and see how they shoot in your rifle.
     
  16. SSN Vet

    SSN Vet Member

    Joined:
    Jan 3, 2006
    Messages:
    6,192
    Location:
    The Dark Side of the Moon
    try 69 gr SMK with 23 gr of H335.... that's a sweet spot in my 16" 1:9 middy
     
Thread Status:
Not open for further replies.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice