I got the Colt, now what ammo is best 1/7" Twist?

Discussion in 'AR Talk' started by XDMulisha, Feb 17, 2010.

  1. XDMulisha

    XDMulisha XDTalk 1K Member

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    I got the Colt LE6940, as some know now. I really want to know what ammo is best for my new rifle. It is a 16.1" Barrel, with 1/7" Twist. What grain, etc? Thanks in advance!
     
  2. 021411

    021411 XDTalk 1K Member

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    1/7 barrels can handle the heavier ammo much better than 1/9. With that said, 1/7 barrels can shoot pretty much everything that is common on the market (55gr, etc). Versatile barrel...

    So which brand/weight is best? Only your rifle knows. Try a variety and see which gives you the best performance. My rifle chews up a variety of stuff without any problems. Brown Bear, Silver Bear, Wolf, PRVI, Rem, Fed..
     
  3. Fdxpilot

    Fdxpilot XDTalk 500 Member

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    A lot depends on what you want to do with it. A good 1/7 barrel will generally shoot any bullet over 50gr. I have even had luck with some 45g SP varmint rounds in my 1/7 LMT. Here are some recommendations (just my opinion, of course.)


    For plinking and general practice - XM193 (55gr FMJ 5.56) or similar .223 round

    varmint hunting - Hornaday 50 or 55gr Vmax, Winchester 55gr Silvertip, Federal 55 or 60gr Vshock

    home defense - Hornady TAP (Tactical Application Police) comes in several grains and varieties. I have several hundred rounds of the 5.56 75gr T2 variety in my SHTF stash. Also Federal Tactical LE Soft Point 55 or 64gr

    Target shooting - any of the various rounds with Sierra 69gr or 77gr MatchKing
     
  4. Alaskapopo

    Alaskapopo XDTalk 5K Member Founding Member

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    For home defense 75 grain Tap or 77 grain Federal Match.
    For plinking 55 or 62 grain FMJ.
    Pat
     
  5. redyak3

    redyak3 XDTalk 500 Member

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    For Hog hunting/HD I like 70gn Barnes TSX handloads,
    Practice/matches, Hornady 55gn HPBT w/c, & 77gn SMK
     
  6. Uriel999

    Uriel999 XDTalk 2K Member

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    Also, feel free to shoot as much .223 from walmart as you want as well. You can get 100 rounds of Federal 55 grain for 40 bucks there.
     
  7. dglock

    dglock XDTalk 3K Member

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    Its not the weight of the bullet that determines what barrel twist will work the best,its the length of the bullet that matters.

    Different bullet shapes will mean different lengths.

    don
     
  8. redyak3

    redyak3 XDTalk 500 Member

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    excerpt from Wikipedia on rifling:

    " ....A combination of the weight, length and shape of a projectile determines the twist rate needed to stabilize it – barrels intended for short, large-diameter projectiles like spherical lead balls require a very low twist rate, such as 1 turn in 48 inches (122 cm).[1] Barrels intended for long, small-diameter bullets, such as the ultra-low-drag, 80-grain 0.223 inch bullets (5.2 g, 5.56 mm), use twist rates of 1 turn in 8 inches (20 cm) or faster."
    Pretty interesting read...
     
  9. XDMulisha

    XDMulisha XDTalk 1K Member

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    thanks alot everyone, yea i tried some American Tactical Imports 5.56 62gr. It did really well, much better than the .223 55gr. Crap they had at the range (Allen Arms). I will keep experimenting, I LOVE THIS RIFLE!!!
     

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