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Question on a Trijicon ACOG TA11-3

Discussion in 'Black Rifle Forum' started by J. Parker, Dec 25, 2010.

  1. J. Parker

    J. Parker

    May 24, 2000
    Ephrata, Wa.
    I'm asking this for my son-in-law. He has a Bushmaster 223 then he bought a Trijicon ACOG TA11-3. Apparently this model is for a 308 rifle. Can he use the TA11-3 on his .223 or does he have to get the ACOG .223 model?

    ~Thanks folks
  2. JBnTX

    JBnTX Bible Thumper

    Aug 28, 2008
    Fort Worth Texas
    He can use it, but the reticle aiming points for 200, 400, 600 and so on, will
    not calibrate properly for bullet impact at those distances.

    He'll have to sight it in at one distance and then just guess at the proper
    hold over for longer distances.

    Each ACOG (5.56 or 7.62) is calibrated for a certain bullet weight and barrel
    length. That means you sight it in at 100yds and then the aiming points for
    the 200+ distances should be accurate.

    Using the "mix" you mentioned throws all that out the window.
    It will only be accurate for the initial sighting in distance and all the 200+
    aiming points won't be accurate.
    Last edited: Dec 25, 2010

  3. J. Parker

    J. Parker

    May 24, 2000
    Ephrata, Wa.
    Thanks JBnTX, I appreciate your reply. He's gonna return the 308 model for the 223 model.

  4. Alaskapopo

    Alaskapopo NRA ENDOWMENT

    Feb 6, 2000
    Actually if he plans on shooting 77 grain ammo the .308 bullet drop is almost dead on. In fact many guys prefer them for their .223's because heavy bullets are very popular.