Have a Nikon .223 dedicated scope on my 24" bull barrel .223. Went to the range, shot way high. Even after appearing to be perfectly aligned when boresighting. Okay, needed to go down, adjusted the scope to the max, still too high. Okay, put shims in the rear of the one piece mount. Still too high. Went into the shop, took everything apart, put it back together with no shims, boresighted perfectly again. I was very careful about this, taking my time. Going back to the range tomorrow to see. Why would it be so hard to drop that bullet impact point down, even with shims?
Weird Scope Adjustment
- Thread starter writerman
- Start date
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- Tags
- boresighting
madmixerman
Gold $$ Contributor
Wouldn't you put the shims in the front as to lower the impact?
joshb
Gold $$ Contributor
I got my thinking reversed, once or twice. Use a good front rest and rear bag. Shoot at the bullseye. Settle the gun and look for the hole. Get the gun situated so that the crosshairs are back on the bullseye, then carefully move the scope adjustments so the crosshairs are on the hole. That kinda removes the “thinking” part.
I watch and adjust from point of aim/point of impact in the correct way, yes. I am very careful about that.
Did that. Have spent a lot of time and the range and finally know how to adjust a scope! LOL!
Holy crap. Maybe I did it in reverse. This is the value of more than one mind. Gonna try that. Sheesh!
6.5 forever
Silver $$ Contributor
Any luck figuring it out?
Yes! Reversed the shims as you pointed out, and I am within two inches of the mark. Still have more to go, because this rifle is capable of putting them in one hole at a hundred yards. I think the scope's clicking mechanism is a bit worn or something, because adjustments are very hard to do. It's a dedicated .223 Nikon scope which can't be repaired, and they don't make them anymore. Guess I could be looking for another scope. Taking it to the range again tomorrow. Thanks for your help.
try some burris sig. rings
dellet
Gold $$ Contributor
Wouldn’t hurt to know what the rifle and mount is. What distance are you trying to zero, and scope height?
Since it’s a one piece mount, does it have a built in MOA slant, and is it mounted correctly?
You should be able count clicks and measure movement to confirm function.
Since it’s a one piece mount, does it have a built in MOA slant, and is it mounted correctly?
You should be able count clicks and measure movement to confirm function.
snert
Silver $$ Contributor
Take th escope off and stand it up on a table, with a white paper under the objective. Dial the elevation all the way till it stops. Then count clicks the opposite way till it stops. Then divide by two and return that many clicks. Look thru the scope with a little backlight and it should look centered as far as the horizontal hair. Repeat with the windage.
Now, remount the scope as it should be back to factory center and re zero the scope. I bet you tweaked it when you went too far one way. Nikons will hang up sometimes at full adjustment and work better in the "middle".
Follow JoshB advice in post 2 for getting a zero. Take a good solid rest and a buddy. Aim at the bull. Shoot. Aim at the bull again and have your buddy move the crosshair to the bullet hole while you hold the gun from moving.
Repeat. See how close you are to the center of the bull. Fire again to find out if you need to move the scope more or if your gun just isn't "that good". If you need to move the scope, repeat as aboe. Aim at the center of the bull, have buddy move the crosshair to the two bullet holes (last two shots). then Aim and fire at the center of the bull again. By now you should be "there".
If the gun won't group, suspect the scope if the gun is an honest shooter.
Now, remount the scope as it should be back to factory center and re zero the scope. I bet you tweaked it when you went too far one way. Nikons will hang up sometimes at full adjustment and work better in the "middle".
Follow JoshB advice in post 2 for getting a zero. Take a good solid rest and a buddy. Aim at the bull. Shoot. Aim at the bull again and have your buddy move the crosshair to the bullet hole while you hold the gun from moving.
Repeat. See how close you are to the center of the bull. Fire again to find out if you need to move the scope more or if your gun just isn't "that good". If you need to move the scope, repeat as aboe. Aim at the center of the bull, have buddy move the crosshair to the two bullet holes (last two shots). then Aim and fire at the center of the bull again. By now you should be "there".
If the gun won't group, suspect the scope if the gun is an honest shooter.
xr650rRider
Silver $$ Contributor
If the adjustment isn't working correctly, you have the rings too tight.
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