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Is it the scope or the rings?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 13:48
flatcooky View Drop Down
Optics GrassHopper
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Joined: September/02/2010
Location: puget sound
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 Hello all,

 Recently I picked up a Kahles K312 from.........SWFA's samplelist. No doubt this is a fine optic in all regards, but I'm having a little problem.

 When I tighten the Seekins 34mm rings to 25# the parallax knob gets real sticky, almost "chunky" when down between 30-100 yard markings.  Almost seems like something is going to snap, it's that unusual. But, it acts as it should from 100-Infinity. When there is no tension or rings on  for that matter the parallax knob is smooth and is incrimental as it's supposed to be.

Without purchasing a different brand of 34mm rings to test the theories I am going to play around with moving the scope forward and back in the rings to a different area on the scope tube. As it seems the pressure of the tightened rings are directly over one of the mechanisms that control the side focus/parallax.
 
 Could rings that are not in spec. cause this issue or am I looking at a faulty scope?
I really appreciate any response.
 
thank you
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 13:51
supertool73 View Drop Down
Optics Jedi Master
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Superstool

Joined: January/03/2008
Location: Utah
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Try 15 in lbs instead on the ring caps.  If the scope does not do that when the rings are not on it, it makes me think it is not the scope. 

How tight are you tightening the ring to base nut?  When I had my 35mm seekins rings at 65 inch lbs it actually bent my rings in a little bit so it made the rings to tight.  I talked to Glen and he told me to back them off to 50 to 55 inch lbs and it solved my problem.

Edited by supertool73 - September/02/2010 at 13:52
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 14:07
flatcooky View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: September/02/2010
Location: puget sound
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Points: 11
 That's excellent advice.
I too have the bases torqued to 65#, I'll back them off when I get home tonight.
Do you also believe that a little blue loc-tite would be appropriate if going down to 15# on the top ring caps?
 
thanks!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 14:14
supertool73 View Drop Down
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I never locktite my cap screws.  But some people do.  So that will have to be up to you.  I check mine often to make sure they are torqued properly and so far they have never came loose. 

I would just do one thing at a time.  Take the scope off the base so the rings are still attached and see if that fixes the problem now that the base nut is loose.  If so then you know what it is.  If not then loosen the cap screws to 15#s.

Most ring manufactures actually recommend 15-18 #s on the caps screws.  So 25# may be the problem.  Warne recommends 25# on their rings. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 14:19
supertool73 View Drop Down
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Looks like Glen actually lists 15-25 on the ring caps and 55 on the clamp screws.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 16:10
flatcooky View Drop Down
Optics GrassHopper
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Thanks for the info, I'll get back with you about the results...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 17:21
jonoMT View Drop Down
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I've gone with 15 in-lbs on ring caps and 55 for the base screws...no problems with either scope mounted that way in Seekins rings and base (one's 30mm, the other 34mm).
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 18:11
stickbow46 View Drop Down
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I have an alternative to the loctite & that is my wifes clear repair nail polish.I found out how well it worked by trying it on my broardheads 15 years ago,never had a problem with rings or broardheads comming loose.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 19:11
flatcooky View Drop Down
Optics GrassHopper
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 Success!!!
  Thank you for the right direction, I feared sending the scope all the way back to Austria. Going through this process cured the problem. Set ring base at 55#, the tension eased up; set ring caps at 15#, eleviated the problem entirely.
  I will try the nail polish first and blue loc-tite as a last resort. I tend to find that some ring screws are loose by the end of a range session, all that load development down the drain when I realize that my 2" groups weren't necessarily operator error.
 Thanks a ton fellas,
 
flatcooky
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/02/2010 at 19:43
Bitterroot Bulls View Drop Down
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Supertool saves the day again!

Nice.
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