The best thing for any shooter and scope is a permenantly mounted bubble level. Use a weighted string (plumb bob) aligned perfectly with the cross hairs and mount the level to the scope. Then level the scope to the barrel of that gun. The mirror method works well. The best way to ensure strait plum scope with the barrel is by shooting it at incremental yardages (with no scope or holdover adjustments, and with the same aiming bullseye point at all the yardages) to "see" if the pattern is truly vertical. If it angles or snakes, the scope need rotated slightly.
 
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Hi all,
I would like to know your thoughts on this type of scope levelers...
Is it worth buying them?

I have one and never actually use it. It technically should get it right or close depending on your action. I use the plumb bob and mirror methods to make sure it is spot on.
 
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The best thing for any shooter and scope is a permenantly mounted bubble level. Use a weighted string (plumb bob) aligned perfectly with the cross hairs and mount the level to the scope. Then level the scope to the barrel of that gun. The mirror method works well. The best way to ensure strait plum scope with the barrel is by shooting it at incremental yardages (with no scope or holdover adjustments, and with the same aiming bullseye point at all the yardages) to "see" if the pattern is truly vertical. If it angles or snakes, the scope need rotated slightly.
Thank you Airgun-hobbyist and Smok3y, I've read about the mirror method and it doesn't seem too difficult to do but it's another thing to do it correctly -I'm completely new to this.
 
Here's a step-by-step that I wrote up a few weeks ago.

The number of steps will initially make it seem more complicated than it actually is, but don't hesitate to ask questions if something isn't quite clear.
 
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I use a gun cradle vice and one of these with magnetic base
20240213_090248.jpg
 
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Here's a step-by-step that I wrote up a few weeks ago.

The number of steps will initially make it seem more complicated than it actually is, but don't hesitate to ask questions if something isn't quite clear.
nervoustrig, thanks for your help (y)