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Posted: 9/21/2010 2:41:51 PM EDT
| I zeroed in a brand new 20" govt chromelined barrel today and had to adjust the front post so low one or two more turns and it would have bottomed out..any idea from anyone why the rifle was shooting so low I had to adjust the post this extreme? |
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Quoted:
I zeroed in a brand new 20" govt chromelined barrel today and had to adjust the front post so low one or two more turns and it would have bottomed out..any idea from anyone why the rifle was shooting so low I had to adjust the post this extreme? Cant you adjust up/down with the A2 upper? All I own are A1`s and Flat tops |
Absolutely what I did was I rasied the post 5 clicks up from it being bottomed out and I adjusted the rear with 6 clicks of elevation and its right on.I adjusted the 8/3 disc so that its like when you adjust for the IBZ I lossened the screw raised 5 clicks so now its 8/3 at 5 clicks.I was just concerend because ive never seen a barrel shoot that low at 50 yds I was aiming at the upper left 5" red circle and hitting the lower one dead center..about an 8 inch difference.I dont mind leaving the rear as is.As long as its hitting to point of aim with a center hold im happy
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Quoted:
Absolutely what I did was I rasied the post 5 clicks up from it being bottomed out and I adjusted the rear with 6 clicks of elevation and its right on.I adjusted the 8/3 disc so that its like when you adjust for the IBZ I lossened the screw raised 5 clicks so now its 8/3 at 5 clicks.I was just concerend because ive never seen a barrel shoot that low at 50 yds I was aiming at the upper left 5" red circle and hitting the lower one dead center..about an 8 inch difference.I dont mind leaving the rear as is.As long as its hitting to point of aim with a center hold im happy Glad you are happy You have built several AR`s havent ya? My 2 Bushmasters shot low from factory. I would say over 5inches at 25M A1 16hbar Kurt cut to 14.7 in 2001 A1 20hbar I bought a LMT 14.5 upper from Paul at BCM Also bought the ARMS 40 went to zero @ 50Y and it was dead on. A First for me. Also the 551F IFFYTECH was almost dead on @ 50 It was off to the L a couple inches The Defender 2000 M4 I got later from LMT WEBSITE I added the ARMS 40Lsp The BUIS didnt need any adjustments. But the Front Post needed to be raised up alot. The ears still are above the post so I dont bitch
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