does changing the magnification move the point of impact ?

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Is your scope first focal plain or second focal plain? Because your getting good answers from both groups. But they can't help you with just one answer until you clarify which scope platform you have.
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I looked it up on the Hawke website and they only make that magnification in SFP. 

This is how a thread should go! No one criticized any of the members and we were all correct and no one talked about how good their scope is versus his. This is why i joined this forum to help and be helped...
 
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I have to argue over a small point.



Point of Impact is determined by ballistics.



Point of Aim is determined by sights/scope.

Lock the gun in a vise and zero the scope so that POI and POA match. Then twist the turret knobs back and forth randomly. Shoot the gun again. The pellet will land in the same spot, even if the scope is not pointed in the same spot. Remove the scope and shoot again. The pellet will land in the same spot again.

Ergo, ipso facto and peptol bismol....

Sights and scopes DO NOT EFFECT the POI. Ballistics rule POI.

Sights and scope DO affect Point of AIM.
 
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target being the same distance .. the short answer is the zero point can change twisting the mag ring on some scopes anyway ... you can figure out if its an issue or parallax is coming into play when you sight it and do a quick zoom from say 4-12 @ 20y ...if it throws it out you know thats something not to do when your after something fuzzy ...
 
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By the way the original post was written, I suspect that the change in range would be the primary factor changing the point of impact relative to your point of aim.

Maybe another way to say what JimNM correctly pointed out would be that dialing the magnification might shift your point of aim due to the erector tube shifting. This is not supposed to happen and would usually be indicative of a poorly made scope. Shoot groups at the same distance at different magnification settings and see what happens.
 
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This may help with POI & POA. Example of ChairGun trajectory chart of .22 pellet. Curved line can be interpreted as POI for whatever range is selected. Scope zeroed at 25 yards.

15-89 Diablo pellets 700 FPS.1628990575.jpg

 
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Nation, 

Also, keep in mind, the best way to sight in and zero any scope that has adjustable magnification, whether it is first or second Focal Plane, is to do so at the highest magnification. If done at a lower magnification, and the zero is off by a tiny bit, that's not noticed at the lower magnification, when magnification is increased, so is the error. Always sight in a variable power scope at the highest magnification. 

Tom Holland 

Field Target Tech 

Fieldtargettech.com 
 
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I have to argue over a small point.



Point of Impact is determined by ballistics.



Point of Aim is determined by sights/scope.

Lock the gun in a vise and zero the scope so that POI and POA match. Then twist the turret knobs back and forth randomly. Shoot the gun again. The pellet will land in the same spot, even if the scope is not pointed in the same spot. Remove the scope and shoot again. The pellet will land in the same spot again.

Ergo, ipso facto and peptol bismol....

Sights and scopes DO NOT EFFECT the POI. Ballistics rule POI.

Sights and scope DO affect Point of AIM.
Click to expand...

Finally.

A voice of reason.
 
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