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62gr .556 vs 62gr 223 Point of Impact

Discussion in 'Black Rifle Forum' started by Patriot III, Mar 1, 2012.

  1. Patriot III

    Patriot III

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    If I have my rifle sighted in at 100 yards with 62 grain .556 ammunition, what point of impact should I expect with 62 grain 223 ammunition?

    I've been trying to research (my eyes are bleeding) but I can't find any comparisons.

    :faint:

    Does anyone have experience specific to this "problem"?
     
    Last edited: Mar 1, 2012
  2. Gunnut 45/454

    Gunnut 45/454

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    Probably about 1-2" lower with .223 at 100 yards. The right or left who knows you'll have to shoot both to find out!:wavey: Are they the same bullet?
     
    Last edited: Mar 1, 2012

  3. Novocaine

    Novocaine

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    I can get 6" vertical shift just by going with the different brand of ammo, same bullet weight.
     
  4. WoodenPlank

    WoodenPlank Who?

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    Everything Gunnut and Novo said, plus the fact that M855 is known to have velocity and accuracy inconsistencies between different lots. Personally, I don't zero with green tip, nor do I keep it in most of my primary magazines - those get loaded with 75gr and 77gr loads, then M193 (if needed) THEN green tip. The M855 is solely reserved for when I need something with better penetration against intermediate barriers - and only then until I can afford to replace my green tip stock with something better for that role.