What is the latest in scope checkers?

[chkunz]

No. Verifying turret correction factor is just one of the multiple uses for a scope checker. But using two scopes on a checker will still give you more accurate calculation results than using a laser.

The scope checker design was originally intended for testing reticle movement under recoil with live fire. The idea is to have one mechanically frozen scope for reference (reticle cannot move) and the scope being tested beside it on the checker. Align them with identical POA on target and fire multiple rounds.

Here's an example of some tests I conducted in the past. Have more test results but no photos of them at the moment. But this will give you an idea of how I personally conduct scope testing.

- The first scope has zero reticle movement in all tests against the frozen reference optic, but a good amount of POA shift in the middle of the magnification levels.

- The second scope has no reticle movement initially, but then has reticle movement during the first 2 rounds fired after dialing the turrets. This one was done at 50 yards so 1/16" of reticle movement is significant at long range.

View attachment 1134981

View attachment 1134982

Now a person could still use a scope with small reticle movements in a competition that allows sighter rounds before record groups as long as the reticle movement is a repeatable pattern and you know exactly when the scope will be solid. Maybe not so good for PRS competition and hunting.


I will conduct a turret tracking correction factor test after the recoil testing. Much more accurate to use a scope checker on a tripod with 2 optics and a level.measurement at an exact known distance than it is to conduct a live fire tall target scope tracking test.
Instead of firing groups from a rifle (which can cause reticle movement), I use a second scope as a zero reference while dialing the other scope for tracking checks. Reference optic doesnt need to be frozen for a tracking test on the checker because there is nor recoil. Any high magnification scope will work as a reference optic.

View attachment 1134983

View attachment 1134984

No. Verifying turret correction factor is just one of the multiple uses for a scope checker. But using two scopes on a checker will still give you more accurate calculation results than using a laser.

The scope checker design was originally intended for testing reticle movement under recoil with live fire. The idea is to have one mechanically frozen scope for reference (reticle cannot move) and the scope being tested beside it on the checker. Align them with identical POA on target and fire multiple rounds.

Here's an example of some tests I conducted in the past. Have more test results but no photos of them at the moment. But this will give you an idea of how I personally conduct scope testing.

- The first scope has zero reticle movement in all tests against the frozen reference optic, but a good amount of POA shift in the middle of the magnification levels.

- The second scope has no reticle movement initially, but then has reticle movement during the first 2 rounds fired after dialing the turrets. This one was done at 50 yards so 1/16" of reticle movement is significant at long range.

View attachment 1134981

View attachment 1134982

Now a person could still use a scope with small reticle movements in a competition that allows sighter rounds before record groups as long as the reticle movement is a repeatable pattern and you know exactly when the scope will be solid. Maybe not so good for PRS competition and hunting.


I will conduct a turret tracking correction factor test after the recoil testing. Much more accurate to use a scope checker on a tripod with 2 optics and a level.measurement at an exact known distance than it is to conduct a live fire tall target scope tracking test.
Instead of firing groups from a rifle (which can cause reticle movement), I use a second scope as a zero reference while dialing the other scope for tracking checks. Reference optic doesnt need to be frozen for a tracking test on the checker because there is nor recoil. Any high magnification scope will work as a reference optic.

View attachment 1134983

View attachment 1134984

This is the kind of information I was looking for. Thanks so much for posting. Data is so much more valuable than opinions. But, sometimes opinions are all we have. Best wishes, Clyde

 

[Fred Bohl]

I don't know enough about lasers to speak intelligently. How stable is the beam from "walking", how stable is it under recoil, how will it be rigidly mounted, what's the beam diameter at 100 yards, how are you going to confirm that it's lined up to within about 1/32" at 100 yards (you can't use the scope your checking)? My suspicion is it's probably a viable concept, however I doubt a dime-store variety laser is up to the task.

Please see http://forum.accurateshooter.com/threads/scope-checker-usage-caution.3967775/page-5#post-37411460

Clyde - If you can wade thru all the posts, you may find this thread informative: http://forum.accurateshooter.com/threads/scope-checker-usage-caution.3967775/