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Posted: 6/2/2013 8:15:03 PM EDT
I have recently purchased a MSAR with the E4 stock. I have put a Burris Fastfire III on it, and absolutely love this setup on my rifles (also RFB and AK). Normally for AR's, if you zero at 50 yards your also on at 200 yards (which I know this isn't an AR, but that is my normal basis for comparison). Today I was at the range and was trying to sight in. At 50 yards I was ending up approx. 2" low, and at 100 I was still 2" high. Uncertain if it was on at 200 - almost 4" of water where the targets currently stand.  Fastfire has a riser and is approx. 2.5" above the center of the barrel where the red dot lies. Is this normal, or do I have something setup odd with these results?
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I had this EXACT thing happen to me with an AR (I think I was using an Eotech Upon rereading it, I was using a mini-acog 1.5X)...there were all kinds of theories--the weirdest was that I had sighted it in somehow at the wrong point of bullet trajectory. ???
I'm not a member or I'd find that thread--it was a mystery. I ended up going to a Micro T1 and now my print is normal--though sighting it in was insanely more arduous than it should have been (for some reason it wasn't on paper and I couldn't find it until I aimed at the dirt and saw where the bullet was hitting). Kentucky windage sighting in. I just know it's happened to others, but can't figure out why. |
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Quoted:
I had this EXACT thing happen to me with an AR (I think I was using an Eotech)...there were all kinds of theories--the weirdest was that I had sighted it in somehow at the wrong point of bullet trajectory. ??? I'm not a member or I'd find that thread--it was a mystery. I ended up going to a Micro T1 and now my print is normal--though sighting it in was insanely more arduous than it should have been (for some reason it wasn't on paper and I couldn't find it until I aimed at the dirt and saw where the bullet was hitting). Kentucky windage sighting in. I just know it's happened to others, but can't figure out why. Not that this helps answer the question but you don't need to be a member. Google "eviljoe wrong point of bullet trajectory site:ar15.com" yields http://www.ar15.com/forums/t_3_18/547479_.html I read it but I don't understand what people were saying either. |
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HAHA!!! Yeah, that was the most confusing bunch of "answers" ever posted.
The OP should definitely read that link to solve his problem. ;o) I was just glad that other people had experienced the 'extra 4 inches' ("That's what she said!"). My favorite was this one for whom 50/200 just doesn't work due to some bending of the laws of physics. "Lindy_Hoppin_Gun_Nut [Member] 3/10/2010 9:22:17 PM I know it sounds weird, but I am not fibbin' - for whatever reason, 50/200 zero doesn't work for me - honest to goodness I am not lying. It must be my eyes / brain or something but whenever I zeroed at 50 yards, my groups would be waaaay high at 100 yards - something like 5" or so. I am not BSing you guys - I was so dismayed when I found out that 50/200 zero doesn't work for me." SEE––> http://www.ak47.net/archive/topic.html?b=3&f=16&t=487887 Speaking of bending laws of physics, in artillery, there is a mysterious thing called "barrel memory" where if you shoot long then try to shoot short, you'll have to put less powder than you think because the round will "remember" and want to go long again--happens in reverse too evidently from short to long (they'll fall short IF you follow the mathematical calculation and don't take barrel memory into account). |
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