4" groups at 50 yards is not acceptable

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    chauncey

    Member
    Feb 17, 2019
    27
    I have experienced really, really poor 5.56 accuracy from:
    1. Lightweight barrels that heated up; in my case Mini-14's
    2. Lightweight bullets through 1:8 twist barrels on AR's

    You've got both

    I agree you should rule out loose optics, muzzle crown and a LOOSE FLASH HIDER (a big problem I have experienced) but if one bullet weight is shooting well and another is not, they are probably just a bad match.

    I keep a range log but I am considering putting a 3x5 card on the stocks if some of my rifles to help me keep all of this straight.
     
    Boats

    Boats

    Broken Member
    Mar 13, 2012
    4,112
    Howeird County
    One of the barrels I have is a faxon pencil 1:8 10.5".

    It shoots 55 and 62 both just fine. I would look at the ammo and other stuff before blaming the barrel.
     
    jimbobborg

    jimbobborg

    Oddball caliber fan
    Aug 2, 2010
    17,121
    Northern Virginia
    The Frontier ammunition worked out well enough that I got hits out to 400+ yards yesterday with it in the SPR rifle. I'll be reloading some of my own 75gr match bullets this week.
     
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