View Full Version : 62gr .556 vs 62gr 223 Point of Impact
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.
Does anyone have experience specific to this "problem"?
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?
I can get 6" vertical shift just by going with the different brand of ammo, same bullet weight.
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.
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