Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Question about optical center
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="bruce_ventura" data-source="post: 709244" data-attributes="member: 34084"><p>I think the advice you got from Leupold is odd. You indicated that you have a zero that drifts over time. It seems unlikely the problem is the scope, so why investigate the mechanical center? Unless that model has a history of related problems, it doesn't seem germane. </p><p></p><p>To answer your questions, the optical and mechanical centers are usually within 5 MOA of each other both vertically and horizontally. </p><p></p><p>The only exception is when a SFP reticle is vertically offset in the erector tube to increase the elevation range. Then it can be 5-10 MOA away from the vertical mechanical center. When the reticle is correctly offset there should be more bullet up adjustment range than bullet down. If otherwise, then the scope has a problem. </p><p></p><p>By "optical center", I assume you mean the reticle position when centered with a mirror against the objective. </p><p></p><p>Which one you should use depends on what you're trying to do. When aligning a scope to the rifle bore (during scope installation), I use the optical center. After the scope is installed, the only thing that really matters is mechanical adjustment range.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 709244, member: 34084"] I think the advice you got from Leupold is odd. You indicated that you have a zero that drifts over time. It seems unlikely the problem is the scope, so why investigate the mechanical center? Unless that model has a history of related problems, it doesn't seem germane. To answer your questions, the optical and mechanical centers are usually within 5 MOA of each other both vertically and horizontally. The only exception is when a SFP reticle is vertically offset in the erector tube to increase the elevation range. Then it can be 5-10 MOA away from the vertical mechanical center. When the reticle is correctly offset there should be more bullet up adjustment range than bullet down. If otherwise, then the scope has a problem. By "optical center", I assume you mean the reticle position when centered with a mirror against the objective. Which one you should use depends on what you're trying to do. When aligning a scope to the rifle bore (during scope installation), I use the optical center. After the scope is installed, the only thing that really matters is mechanical adjustment range. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Question about optical center
Top