bit of scope zeroing advice needed

[woodpigeon]

hi guys,recently got myself a new scope,new to me but second hand.had a bit of time today to mount it and set about zeroing it.i normally am quite good at this task but today i cant do it.i have used all my elevation adjustment,and still need to adjust the scope up.i have never had this before,is this where i have to shim the mounts?if so rear or forward?any help much appreciated.oh also i changed the mounts from one set to another both high,just to see if this made a difference,it didnt.

[bobby822]

hi guys,recently got myself a new scope,new to me but second hand.had a bit of time today to mount it and set about zeroing it.i normally am quite good at this task but today i cant do it.i have used all my elevation adjustment,and still need to adjust the scope up.i have never had this before,is this where i have to shim the mounts?if so rear or forward?any help much appreciated.oh also i changed the mounts from one set to another both high,just to see if this made a difference,it didnt.

Put the front mount back and back one front

[bobby822]

Put the front mount back and back one front

If that doesn’t help then you need to shim. Election tape works a treat

[JerryD]

Get some decent adjustable mounts - ATP61 if it's a 30mm tube - or shim the rear mount as a second option:

https://www.pyramydair.com/blog/2005...-shim-a-scope/


.

[NewPaul]

Put the front mount back and back one front

Worth a try

If that doesn’t help then you need to shim. Election tape works a treat

However, before you shim, check to see that the turret is ‘centralised’ as the previous owner may have wound it all the way (or very near to) it’s end. Wind the turret in any direction to its end then wind it all the way back to its other end whilst counting the amount of rotations it takes to get there, then, wind it back half the amount of rotations which should get you somewhere very near it’s centre point. Hope that makes sense ?

[thisisdonald]

Or use the mirror method... in bright sunlight stand the scope upright on the objective lens, on the mirror. Look through it and you'll see 2 sets of crosshairs. Simply adjust the elevation and windage so that they perfectly overlap. Et voila - optically centred in seconds.

[woodpigeon]

So when i centraise,do i shim the rear mount?thought it would be the front so as to raise po[nt of impact?

[NewPaul]

Or use the mirror method... in bright sunlight stand the scope upright on the objective lens, on the mirror. Look through it and you'll see 2 sets of crosshairs. Simply adjust the elevation and windage so that they perfectly overlap. Et voila - optically centred in seconds.

Yep, done that before and it works well

[Jesim1]

So when i centraise,do i shim the rear mount?thought it would be the front so as to raise po[nt of impact?

If you have tried the other things - then yes, but three layers of black electrical tape may be enough, I'd also try it with the scope centred with the turn method - it's easy to do and does not involve taking the scope off and messing with mirrors - which I have never been able to get to work because it does not work with all scopes.

James

[NewPaul]

So when i centraise,do i shim the rear mount?thought it would be the front so as to raise po[nt of impact?

Centralise first and then check as you may not need to shim. It sounds illogical but it would be the rear of the scope that you would shim in your case.

[Portzy]

I have had this problem before myself. Could I ask, what is your rifle/mount manufacture combination?

[Willenium]

So when i centraise,do i shim the rear mount?thought it would be the front so as to raise po[nt of impact?

Shimming under the scope on the rear mount points the scope downward which has the effect of raising the muzzle thus raising the point of impact.

[woodpigeon]

Shimming under the scope on the rear mount points the scope downward which has the effect of raising the muzzle thus raising the point of impact.

Gotcha👍Will try swapping mounts around,then centraliz the crosshairs,then shim the rear.took me a while to get my head around shimming the rear.i drew it out and makes sense.
Thanks everyone,will try the above when I get home from work.

[ChrisC]

Gotcha👍Will try swapping mounts around,then centraliz the crosshairs,then shim the rear.took me a while to get my head around shimming the rear.i drew it out and makes sense.
Thanks everyone,will try the above when I get home from work.

If you need some shim material mate then please PM me your address as i've got some kits made with proper shim material in different thicknesses. In fact that goes for anyone else on a first come, first served basis as i think i have 3 or 4 kits left.

[secretagentmole]

If that doesn’t help then you need to shim. Election tape works a treat

But what happens if you need Conservative and only have Labour? Or worse, SNP?