What bullet weight for two different AR's?

Discussion in 'Reloading' started by KSUGLocker, Feb 6, 2013.


  1. I have two ARs. One is an M4 Carbine with a 16" 1 in 7 twist barrel. The other is an A2 with a 20" 1 in 9 twist barrel. I am going to start reloading some of the buckets of .223 brass I have and would like to build one load that is sufficient for both guns. I'm not looking for bench loads or any type of serious target load, just something that is decent for both guns. I've read a lot of recommendations of the 62gr for the 16" but am unsure of how well it'll work in the A2.

    I'll most likely be using H335 for the powder but am open to suggestions on that as well as primers. Ideally I would like a multi-caliber powder that I can also use for .308 and 30-.06 for my FAL, M1A and 17 or so Garands.

    FWIW I plan on utilizing my Dillon 550b once I work up the load.

    JimA
     

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  3. NBT

    NBT

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    FWIW the March 2013 edition of Gun's and Ammo magazine just put out an article worth reading on this very subject....called "The Spin on .223 Twist Rates" by James Tarr.
     

  4. I'll pick it up tomorrow. Thanks!
     
  5. Boxerglocker

    Boxerglocker Jacks #1 Fan

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    I think you better define you actually needs....

    I personally load lots of H335 with Hornady 55 sp w/c for both my 1-9 twist bolt gun and 1-7 twist ARs. They do great out to 300 yards for varmint hunting, in the AR it will do MOA and half MOA in the bolt.
     
  6. Most of my AR shooting is blasting out to 50 yards. Eyesight not good enough to do much long range shooting.
     
  7. I use mostly 55gr. in my 1 in 9 twist guns, but have also had good results with 62gr. an up to 69gr nosler bullets in the 1 in 9 twist barrels with BL(C)2 or H335.

    That said while I don't have a 1 in 7 twist, I agree with Boxer and don't think you would be spinning the 55gr bullet too fast in the 1 in 7 twist gun. Especially at 50yds!

    Good Luck
     
    #6 ColoCG, Feb 7, 2013
    Last edited: Feb 7, 2013
  8. G31

    G31
    Millennium Member

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    55 or 62 with that powder. It's better for the light-to-medium loads. I load 55s for everything out to 300m, and 69s or 77s for longer distance.
     
  9. Boxerglocker

    Boxerglocker Jacks #1 Fan

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    If that's all you need... go cheap my friend. Pull down powder and any 50-55g bullet you can find. Twist will not matter much at that range.
     

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