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Thread: 1st rounds fliers...what causes them?

  1. #31
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    Quote Originally Posted by gaijin View Post
    My experience has not been with 1st, but LAST rd. fliers, in an autoloader/AR.
    Fairly regularly when shooting to bolt lock I’ll have a rd. substantially out of the group.
    I read a Seekins article that tried to explain this as a barrel harmonics issue-that barrel doesn’t vibrate/flex the same when bolt doesn’t go forward.

    As far as 1st rd. fliers; as long as I charge the gun by dropping bolt with bolt release- I’ve not experienced this issue.
    Yeah, what’s up with the LAST round fliers? I get those too and it doesn’t make sense as the bullet has left the barrel long before the bolt locks back.

  2. #32
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    Barrel makers and bench shooters say that is false. Barrells shoot better, fouling especially copper removed. Clean barrels shoot better at the highest levels.

  3. #33
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    Quote Originally Posted by gunnerblue View Post
    All of my AR’s equipped with magnified optics also have two-stage triggers and all will throw the first round high if a chamber using the charging handle. If I load by releasing the BCG from lock-back, the first round is not thrown and the groups are even.

    I believe that releasing the bolt more closely mimics the cycling of the action after a fired round.
    When I got into AR's, my buddy who was most knowledgeable always said for best groups, release first round from lock back, don't charge via charging handle. Always followed this advice really only for scope and sight zeros, and haven't seen the first round flier for those cases. Never really thought about it until this thread popped up.

  4. #34
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    If your first round flyer off-set is consistent, just remember it and compensate with your sight alignment, then aim dead center for subsequent rounds...same principle as with a sound suppressor off-set...remember you are in control, not the rifle...
    ColdBlue sends...
    (CB is David A. Lutz, Lt. Col. USMC (Ret'd) (1968-1991)
    Former (now retired) VP MilOps @ Knight's Armament Company (KAC) (1994-2012)
    "...if you can read this, thank a Teacher,
    if you are reading this in English, thank a Veteran..."

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