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Scope Tracking/Repeatability test proceedure

 
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  #15  
Old 02-02-2011, 08:36 AM
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Join Date: Nov 2010
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Re: Scope Tracking/Repeatability test proceedure

Quote:
Originally Posted by Jon A View Post
It's a widely known problem that is pretty common with MK 4's (VX-I or VXII, VX3 owners for that matter are oblivious for the most part) and Leupold doesn't seem to care about tightening it up as it has continued to happen for years. Plenty of reading material HERE. How precisely have you been checking yours?

Dang, that would suck. I'm glad mine is not like that.
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  #16  
Old 02-02-2011, 10:18 AM
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Join Date: Nov 2010
Posts: 364
Re: Scope Tracking/Repeatability test proceedure

Not common with any of my VX-3s or Mk 4s. None of them. This is the first place I have ever heard of that. Again, a credit to the forum.

I check mine with a yard stick, and a level on the mounted scope, not so unlike the way shown here. I haven't noticed anything but straight reticles. I haven't ever noticed any canting, except with the old fixed 4 power I had with them. It was off slightly, and it wasn't holding zero. They told me it was off by 2 degrees and they would replace the whole scope rather than repair it because it was so old, so that could be why it wasn't an issue with them. Interesting now that I look back how they made a point of telling me the exact degree of canting. At the time I didn't pay much attention, because, well, they were replacing the scope.

I haven't had any problem with them as far as customer service goes. In fact, I dropped one of my VX-IIs a couple years back and dented it. I sent it in and told them to let me know what it cost before they fix it. They sent it back to me repaired free of charge 3 weeks later.

But I agree, 3 degrees is not cool. Buddy hasn't got back to me. He is a process engineer for them, so not sure what insight he will have. Always good to give him a jab though. It seems very un-Leupold like to fix that.

Last edited by Lapua guy; 02-02-2011 at 10:23 AM.
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  #17  
Old 02-02-2011, 12:29 PM
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Join Date: Dec 2005
Posts: 217
Re: Scope Tracking/Repeatability test proceedure

Quote:
Originally Posted by Loner View Post
Funny you would post this poser today. Last night I had the idea of using the
burris pepr mount with the additional picatinny on top. Mount a second scope to it
and zero them both to the same spot. Then in a lead sled or tipton vise run the box
test with the lower scope, being able to always look at the top scope for your original
zero. No rounds necessary, you can do it in your living room looking out a window if
you so chose. Takes all the shooting or group error out of the test as well.
About 5 years ago , BenchResters were having discussions back & forth about Leupolds holding stable . Someone built and sold an Aluminum fixture which I think mounted on Davidson Bases which many Benchresters use . The fixture mounted 2 Scopes side by side so that you could compare an old known reliable Scope to one which you thought might be defective . Similar to your idea .
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  #18  
Old 02-02-2011, 02:23 PM
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Join Date: Mar 2008
Location: SW Idaho
Posts: 1,148
Re: Scope Tracking/Repeatability test proceedure

Jon A.,

As always excellent detailed description! The pics just make it that much better!

Do you suggest a specific collimator that you have had good luck with?
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  #19  
Old 02-02-2011, 03:39 PM
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Join Date: Dec 2001
Location: Mukilteo, WA
Posts: 1,091
Re: Scope Tracking/Repeatability test proceedure

Quote:
Originally Posted by Lapua guy View Post
I check mine with a yard stick, and a level on the mounted scope,
That might show if something is way off, but you really need to check the tracking with respect to the reticle. With the reticle on a straight edge or line, crank in 30 or 40 MOA elevation and see if it stays on the line. That's the only way to know for sure. Enough cant to cause windage problems at long range isn't something you'll necessarily "notice." You need to really look for it to make sure you don't have it.

Please do harass your friend at Leupold. There are people who will no longer buy MK 4's due to this issue alone.
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  #20  
Old 02-02-2011, 03:42 PM
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Join Date: Dec 2001
Location: Mukilteo, WA
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Re: Scope Tracking/Repeatability test proceedure

Quote:
Originally Posted by Scot E View Post
Do you suggest a specific collimator that you have had good luck with?
The Leupold works well and is easy to use. It's not a precision lab-quality instrument, but if something on your scope is more than 1% off it's pretty easy to find it with that.
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  #21  
Old 02-02-2011, 03:48 PM
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Join Date: Mar 2008
Location: SW Idaho
Posts: 1,148
Re: Scope Tracking/Repeatability test proceedure

Quote:
Originally Posted by Jon A View Post
The Leupold works well and is easy to use. It's not a precision lab-quality instrument, but if something on your scope is more than 1% off it's pretty easy to find it with that.
That is the model I have.

The other thing you can do with it is run your scope from min to max power and watch to see of POA changes. I have had scopes do this too which really screws up accuracy if you up the power from where you sighted in.
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