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Question about temporary O-ring removal

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 11:58
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First, thanks to koshkin and cheaptrick for their help.  I recently purchased a Nikon Monarch 4-12x40 (amazing) and a Buckmaster 3-9x40 (also amazing) rather than Leupolds and am very happy with them both.  The sample list is awesome!

I will begin by noting that this is entirely my mistake.  I recently received my Buckmaster (got it from the sample list) in the mail, and was stricken with the brand new condition of the scope.  As some of you know, the power adjustment rings can be a bit hard to turn on the Buckmasters.  I don't know much about rifle scopes compared to most of you, and foolishly loosened the screw that clamps down the o-ring.  After a bit, I removed the screw entirely.  The screw was removed entirely for less than 10 seconds (I am hoping this isn't very long).  Also the opening, for the duration of 10 seconds, was facing up - I don't know if this matters.
 
So, my question is this:  Do you folks think that this was a significant amount of time for the nitrogen to have leaked out?  I am very concerned as this is a quality rifle scope and I'm a rather poor college student. 
 
Helpful comments would be appreciated!
 
:-)
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 12:49
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You have probably compromised the nitrogen to an extent, nitrogen is lighter than air so it would leak out for sure, there is also the slightly positive pressure that helps to keep the moisture out as well. If you're in doubt you can purge it by getting some nitrogen gas at a truck stop that uses nitrogen gas. Many of the trucks on the road use it as it helps fuel economy as well as tire life, so it shouldn't be hard to find some. Just make sure that you purge your container (fill it with nitrogen and empty it three times) then purge your scope, the same way. You may need to find a chuck that is rubber nozzle tip to do this. You wont be able to put a positive charge to it but atleast you'll know it has no oxygen.  
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 13:05
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Thanks Cyborg - I called Nikon's technical support and the representative suggested I send it in to be purged.  I have heard some stories about their support though and honestly, I don't know if it's worth the trouble.
 
Any other suggestions or comments?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 13:05
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OR...send it back to nikon and have it checked/repurged.

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 13:07
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I'm thinking that might be what I have to do - despite my reluctance to do it.  I guess I'm worried primarily that it will be at the factory for a long time.
 
Thanks to you both and Merry Christmas!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 14:53
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Glad you like your scope and thank's for the thank's...Wink
 
How's the scope look inside?? Blurry?
The screw is back in now right?
Guys, are we SURE loosening the power ring lets out the nitrogen??  
 
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 14:58
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The screw fits into the zoom tube, and several scope manufacturers use this as the purge port, so yeah I'm sure.  
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 15:09
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without a schematic we have to assume that it is the place for the nitrogen
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 15:18
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I could be wrong but I don't think it will take too long for this to be done.

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 20:52
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 If you're reluctant to send it to Nikon, how about Premier Reticles? Or some other custom reticle company if there are more than one out there. (Hope I got that name right.)
 I would think they would do it all the time. Don't some manufacturers use Argon instead of Nitrogen these days?  Just wondering if it hurts anything to mix them...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:10
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Cheaptrick - the optics on both of the scopes are out of this world.  With the Monarch: I was calling coyotes the other evening and sat out well past sunset and had no problem glassing the distant treeline.
 
The Buckmaster is equally as clear but I haven't used it at twilight yet. 
 
I'm officially a devoted Nikon fan - this is my third one and I've loved them all.
 
Side by side - I prefer either of them to the VX-III's I've looked at. 
 
Thanks for the suggestion RONK - I'm looking into it as we speak.
 
I'm not having any sort of problem with fogging and don't think I will either.  I'm just a perfectionist.  What can I say?  I'm a musician.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:13
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nikon doesnt use argon that i am aware of all of my nikon scopes are nitrogen purged, you will see that the monarch is better at last light than your buckmaster as it should be! we did hear about a good result from nikons cs dept last week as well, so maybe they have changed a little for the better
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:36
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I think I've figured it out guys :-)
 
Since the purpose (I believe) of nitrogen purging is to remove all moisture located within the scope during the manufacturing process (and the seal is to keep it out), I don't think that 5-10 seconds would be enough time for the nitrogen to escape and moist air to enter.  Our house's air is roughly (Nebraska winter) 30-40% humidity. 
 
If it would have been in the summertime during 90+% humidity, I might be a bit more worried.
 
Honestly, I don't think much of the gas escaped.
 
Thanks for all of the help, guys.  I love my Nikons!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:43
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the largest component to atmospheric gases is nitrogen, so any diffusion would be low, but not with the nitrogen, but water. suprizingly most top line scopes such as USO don't use nitrogen, but assemble in dry rooms with atmospheric control and with laminar flow hoods, much like chip manufactures, nitrogen or argon purges are a "cheap" way to do the job, although better than nothing, if you mess with N2 it must also be water free, which may not be the case. Let you scope sit in a hot place for about an hour then stick it in the freezer, if no problem youre ok-- if foggy go from there.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:56
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Awesome, thanks Dale.  You hit the nail on the head.
 
If it fogs I'm sending it to Nikon.  You guys rock like Boston.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/21/2007 at 21:57
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they dont rock any more brad died this year remember
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