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Elevation almost bottomed out- Bad?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/15/2010 at 18:29
juslearnin View Drop Down
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So, I just sighted in a kahles helia cl 3-10 with multi zero on a rifle with a 20 moa rail.  I knew I would be close to running out of elevation adjustment, as the scope has I think 48 moa total adjustment.  I am 7 clicks from bottoming out the elevation adjustment.
 
My question is- is this bad for the scope?  I picture a spring completely compressed for the next 20 years.  I also wonder if the windage adjustment will track correctly when the elevation is at such an extreme.
 
Thanks.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/15/2010 at 18:36
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The rail isn't on incorrectly, is it?
Big bump to the rear? Right?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/15/2010 at 19:11
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No, it is doing exactly what I would expect it to do.  If the scope has 48 moa total adjustment, then when it is in the middle of its' range, you would expect it to have 24 moa of adjustment in either direction.
 
If you put it on a 20 moa rail, then there would only be 4 moa adjustment left between zero and the end of the adjustment range.  In my case, in reality, it is 2.3 moa from the end.
 
The question is, then, is this a bad thing to do to the scope?  Should I get a 10 moa rail to try to bring it closer to the center of the adjustment range, or is it ok to leave it as is?  With the multizero turret (if you use it the way it was designed) you only get one revolution of elevation before you hit the zero stop, so having all the elevation adjustment "to spare" doesn't really do much for me.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/15/2010 at 19:27
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Unless the spring is poorly designed for the application, keeping it compressed should not be  a problem. Over loading a spring is a different story. The number of compression cycles is what cause fatigue and eventual failure.
I would be more concerned about windage, as you already are.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/16/2010 at 01:04
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You can check windage tracking by using a precisely drawn scale at 25 m (its a Kahles) or by 'shooting the box".  I prefer the shooting option, but accuracy will depend as much on the shooter as the scope.  Some prefer tracking the scale.  When I have time, I use both methods.  When time is short, I shoot...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/16/2010 at 03:40
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Originally posted by juslearnin juslearnin wrote:

No, it is doing exactly what I would expect it to do.  If the scope has 48 moa total adjustment, then when it is in the middle of its' range, you would expect it to have 24 moa of adjustment in either direction.
 
If you put it on a 20 moa rail, then there would only be 4 moa adjustment left between zero and the end of the adjustment range.  In my case, in reality, it is 2.3 moa from the end.
 
 
My bad. Your exactly right.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/16/2010 at 11:39
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An overwhelming majority of scope issues are related to adjustments being maxed out or close to maxed out.

20 moa bases are primarily used on scopes that do not have enough adjustment to get to a 1000 yards and usually the scopes are being used at longer ranges the majority of the time so the erector is close to the center most of the time.
 
If you have a hundred yard zero and plan to keep it there most of the time then you should replace the 20 moa base with a 0 or 10.  Basically you want your adjustment to be as close to the center for the "zero" that the scope will see most often.


Edited by Chris Farris - August/17/2010 at 09:27
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/16/2010 at 11:47
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Good advice Chris.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/16/2010 at 22:38
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 10:21
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If you can post your bullet and speed I can give you an estimate on the range your scope would have with no rail and 10 MOA.  I just released an iPad app for this yesterday, and would be glad to help you calc this out with a different rail.  (max range in yards, ect...)
 
Jeff
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 11:52
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Jeff,
 
Post a link to your app, in fact start a new thread and post a link to it if you like.
 
Chris
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 12:56
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Thank you Chris.  I've been hesitiant as some could see this as a "commercial" post.  I wrote this on my own time at home and would love to at least recoup the hardware and web site costs!
 
Here is a link to my site:
 
 
 
Here is a link to the iTunes App store ad:
 
 
 
Jeff
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 13:00
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Originally posted by cornhuskid cornhuskid wrote:

Thank you Chris.  I've been hesitiant as some could see this as a "commercial" post.  I wrote this on my own time at home and would love to at least recoup the hardware and web site costs!
 
Here is a link to my site:
 
 
 
Here is a link to the iTunes App store ad:
 
 
 
Jeff
 
 
neat site.  Just wish i had an I pad....
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 13:09
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Very cool Jeff. I saved this into my favorites file.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 13:11
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No prob Jeff as it is nothing that competes with SWFA and is something that could be very beneficial to O.T. members.
 
I've looked at all of your posts and you are a good contributing member not here to just pimp your app.
 
Start a new thread about it in the firearms or reloading section.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 13:23
cornhuskid View Drop Down
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Chris,
 
You should pick one up for the shop.  (tax write off!)  If you end up buying the software I will give you back my "cut" from Apple, which is about nine bucks...
 
Again, THANK YOU!
 
Jeff
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 20:13
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Wow, very Gracious of you CF..........
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 21:49
cornhuskid View Drop Down
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WEll you know stickbow, it all adds up...

:)


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2010 at 21:50
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Chris is a great guy!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2010 at 09:09
cornhuskid View Drop Down
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Still need that info?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/30/2010 at 13:14
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Watch this video in regards to adjustment travel.
 
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/30/2010 at 14:06
stickbow46 View Drop Down
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That was very informative,thanks CF & the Swaro team!
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