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Sighting in scope

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/13/2008 at 22:13
ripper View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: February/24/2008
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Hi everyone, I have a ouestion about bore sighter's and scopes. I have mounted a US Optics scope on my Springfield M1A.  The scope is a SN3  1.8x10 power variable. I am using a Magentic bore sighter, it is the Grid type with the little boxes. Each box is 4MOA at 100 yards. I installed the scope and looked through it and the bore sighter. Made the adjustments and centered the cross-hairs of the scope on the center-line of the grid for windage and elevation. Went to a 25 yard indoor range to see where it was hitting. Took a 3shot group and was hitting about 3inches to the right of the bulls-eye. My knobs are 1/4in. a click at 100 yards, I turned my windage knobs 16 clicks or 4MOA of left windage and was hitting center of bulls-eye. I put the bore sighter back on the rifle and looked at the grid again and my cross hairs of the scope were 4MOA TO the right of Center of bore sighter center line. My ouestion is when you turn your knobs on your scope to move point of impact of the bullet to left, why does the cross hairs move to the right on the boresighter? I am new to scope shooting so please bear with me I am still learning how. This is my first time setting up a scope and using a bore sighterHowdy
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/13/2008 at 23:36
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Optics Master Extraordinaire
Optics Master Extraordinaire
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Joined: February/20/2008
Location: North Carolina
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Points: 3641
I have no experience with bore sights but you have found some folks that I'm sure can help. Once you get your rig going let us know what you think of the US Optic. I'm all but convinced of getting a SN3 real soon. And I wanted to say welcome to the OT.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/14/2008 at 04:51
8shots View Drop Down
Optics Jedi Knight
Optics Jedi Knight
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Lord Of The Flies

Joined: March/14/2007
Location: South Africa
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Points: 5751
Ok, so your bullet impacts to the right of the crosshair. You  physically move the crosshair right by dialing what is indicated as left on your dial. The image in a telescope is originally seen wrong way around and upside down. It is corrected by the second focal plane or erectors. So what your eye sees is not what you get. Smoke and mirror stuff or optical science, take your pick. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/14/2008 at 07:54
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Optics Jedi Knight
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Joined: January/02/2007
Location: Ontario, Canada
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Points: 5347
Just as 8shots said - move your adjustments (when viewing your boresighter grid) opposite to what you would usually do when shooting at a target
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