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AR15.COM
3/1/2011 1:11:11 PM EDT
I have heard that the 50y zero will also give you the same POI at 200 yards.  Does this work out regardless of what barrel length?  Or is a 20 different than 16, etc?
3/1/2011 1:16:15 PM EDT
[#1]
Quoted:
I have heard that the 50y zero will also give you the same POI at 200 yards.  Does this work out regardless of what barrel length?  Or is a 20 different than 16, etc?


http://www.ar15.com/forums/topic.html?b=3&f=18&t=328143


3/1/2011 1:41:33 PM EDT
[#2]
I forgot to mention -

There is a slight variance between barrel lengths, but it's negligible out to 200 yards.

All of my barrels are z'd at 50 yards -
10.5"
11.5"
14.5"
16"
I don't own anything in 5.56 with a 20" or longer barrel