Quantcast
  1. Sign up now and join over 35,000 northwest gun owners. It's quick, easy, and 100% free!

What grain bullet in a 1/9 twist 16" barrel

Discussion in 'Ammunition & Reloading' started by mookmanjdj, Dec 23, 2012.

  1. mookmanjdj

    mookmanjdj Oregon Coast Member

    Messages:
    153
    Likes Received:
    5
    I currently prefer to use a 55 gr bullet when I reload 223 rounds. If I load for a 1/9 twist 16" barrel, should I go up or down in weight if I am forced to use a different grain because of availability. Thanks for your help.
     
  2. Lindy

    Lindy Central Ca. Member

    Messages:
    78
    Likes Received:
    63
    mookmanjdj
    Heavier bullets will be the same diameter as lighter ones but will be longer and reguire more spin to stabilyze them while in flight. That being said, I suggest that
    with Your 1/9 twist that You probably could shoot about a 75-80 grain bullet with no problems. if it were me I would go up in weight if possible.

    Good shooting

    Lindy
     
  3. AMProducts

    AMProducts Maple Valley, WA Jerk, Ammo Manufacturer Silver Supporter

    Messages:
    2,805
    Likes Received:
    1,860
    with a 1:9 twist, you should be good down to about 50grs, but would be better off going heavier. For the 16" barrel, you might not want to get much heavier than 69gr as you won't have the muzzle velocity and twist to stabilize it. I don't recommend going to the really heavy weight bullets (75+)
     
  4. dmwebb34

    dmwebb34 Bend, OR Member

    Messages:
    51
    Likes Received:
    12
  5. mattdomes

    mattdomes Newberg Active Member

    Messages:
    499
    Likes Received:
    120
    55 gr to 62 gr bullets
     
  6. deadshot2

    deadshot2 NW Quadrant WA State Well-Known Member

    Messages:
    2,407
    Likes Received:
    537
    Lots of variables besides just weight to consider. Bullet shape, length, velocity, are a few.

    A long "VLD" bullet in a heavier weight will perform just as well as a lighter, shorter bullet.

    My 16" bbl AR's perform quite well with bullet weights from 50 gr to 77gr (SMK's). One is a 1:8 and the others are 1:9.

    Just remember that a 16" bbl AR is a "Carbine", not a "Sniper Rifle".