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Posted: 1/12/2005 11:35:22 PM EDT
I know it's not recomended but if an Eotech was mounted on an A2 (Not gooseneck) is it possible to maintain a somewhat flat trajectory from 50yds out to 200yds?  I realize it is going to shoot pretty low at 25 yds, but it's only going to be used for hunting and the average shot will be under 100 yds.  If anyone has this setup what is the difference in trajectory from 50 to say 150 or 200 yds?  I couldn't find an answer while searching but I remember someone claiming like a 4" difference between 50 yds and 100 yds?
Link Posted: 1/13/2005 3:24:38 AM EDT
I don't have that setup but I ran the numbers through a program I have that calculates trajectories of different load/rifle combos.  I figured with the EoTech mounted on the carry handle the sight is about 4" above the bore and came up with these numbers. With a 50 yard zero you would be 3" high at 100 yards and 5" high at 150. A 100 yard zero would be a better bet. At 50 yards you would be 1.5" low and at 150 you would be 1/2" high. At 25 yards the 50 yard zero would be just under 2" low and the 100 yard zero would be just over 2.5" low. If you want to play around with different zeros to find which one you like the best you can get the program here: Shoot! 3.0. It has a 30 day free trial.  
Link Posted: 1/13/2005 7:36:23 AM EDT

Originally Posted By upnorthbacon:
I know it's not recomended but if an Eotech was mounted on an A2 (Not gooseneck) is it possible to maintain a somewhat flat trajectory from 50yds out to 200yds?



For giggles we'll assume M193, 20" barrel, 100y zero, and std atmospheric conditions at 1400'ASL...

0 -4"
25 -2.7"
50 -1.5"
75 -0.6"
100 0
125 +0.4"
150 +0.5"
175 + 0.3"
200 -0.2"
225 -1.1"
250 -2.3"

How does that work for you?  At CQB distances (say under 50y) you have to compensate for the really high HOB - but at 50+ you have a very flat trajectory to 200M+ (roughly +/- 1")
Link Posted: 1/13/2005 11:13:33 AM EDT
Thanks a ton that was exactly what I was looking for.
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