Yes, and yes! LOL
PMC 62grain. However, it was the same ammo that I was using in my DD 16" that was about 2" high (at 100yd) and zero'd at 200yd
Great Thread Molon I will be going out and sighting in my AR again after I paint it this winter. Again thanks for the great info.
WFD
EMR
FF
I have a Colt 6920, 1:7 twist 16in. detachable carry handle, firing xm193, and I followed the IBZ instructions and was able to group very well at 100 yards using -6 clicks, and I also grouped very well at 50 yards, -4 clicks using the small, unmarked aperture. My question is if I return the rear setting to 6/3 and use the 0-2 large aperture will my rifle shoot POA/POI inside 0-200 yards? Thank you in advance for any responses.
In Houston were are recommending the 50 yard zero.
What the 0-2 sight is for is fighting inside of 200 yards. It's not supposed to be a precision shooting aperture. Short answer, no. Long answer, Yes, if you were capable of lining the front sight post up dead center of that aperture consistently, and hold it there, you would theoretically shoot POA/POI or very close to it. I have yet to meet anyone who can do it consistently.
For precision aimed shots, use the small aperture, even inside of 200. For quick target aquisition using iron sights, use the 0-2 sight, but don't adjust your elevation to use it, because it really serves you no purpose. Just put the tip of the front sight post relatively in the middle of the aperture, and pull the trigger. It's basically a bullet hose sight, as it realistically would only be good for suppressing fire on an area.
Yes, I would like to hear from people running 70-75 grain ammo out of shorte barrels as well. I am running 70gr tsx and 75gr otm's out of a 14.5" using an aimpoint, and when I zero at 50 I am a good 2" high at 100. 100 yards is all I I currently have access to. So how is the hevier stuff doing out past 200 with a 50 yard zero?
Last edited by kenndapp; 02-07-12 at 20:21.
A great explanation of the M4 zero:
http://www.youtube.com/watch?v=TgyRBqcsRcE
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