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How Does a Optical Bore sight Work?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/29/2008 at 09:45
ripper View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: February/24/2008
Status: Offline
Points: 3
Hi , I have a US Optics SN3-1.8x10 power scope. I used a Magnetic Optical bore sighter to get on paper. I went to a 25yd indoor Range to see where I was Hitting. I was hitting 3in. to the right of Bulls-eye and high about 3in. Made adjustments for windage and was hitting dead on center at 25yds. For elevation I was aiming cross hair about 2in. below center of bull and was hitting dead on. So I did not mess with elevation. So I put bore sighter on rifle to see where it was at on the grid. My question is when you are adjusting the scope say to the left, I am turning windage left, the cross hairs are moving to the right on the bore sight grid. Is everything the oppisite when looking through the scope and bore sighter? Left is right, and right is Left? I am turning knob to the left to move bullet impact to left. how about elevation Is it the oppisite also on the bore sighter also? I went to the desert last week and set up targets at 100yds and was hitting about 12in high over the targets so I turned elevation knob down 11 MOA and was aiming cross hairs 2 in. below target and was hitting dead on. I put bore sighter on rifle and it showed cross hairs above center of grid, so is everything oppisite/Please advice   Thanks Ripper
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/29/2008 at 17:14
3_tens View Drop Down
Optics Jedi Knight
Optics Jedi Knight

Joined: January/08/2007
Location: Oklahoma
Status: Offline
Points: 7130

I have never found a bore sight that will be center on the grid from rifle to rifle. It is used to be a tool to help get you on the paper. Once you have centered the rifle by shooting then you recheck the grid on the bore sighter and mark yourself a reference point so if the scope is removed it can be replaced and returned to the marked reference point thus resetting back to the rifles center. As to the other part of your question the cross hair will be moving to the point of bullet impact to establish rifle center on your bore sight grid.  This will be opposite of moving the point of impact to the cross hair as when shooting.

Good luck on your new scope.

Edited by 3_tens - April/29/2008 at 17:14
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