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Collimator continued...

Permanently deleted user
HeDog:

quote:The collimator on a spud rotates around the bore, but does not really lean, thus the scope mounted parallel to the bore can rotate in the rings, but cannot revolve around the bore as the collimator can. Still, you can line them up perfectly and still have the scope canted a tiny bit, that is why I use a leveler as well as a magnetic collimator.


Is this just b/c of discrepancies in with your eyes or does it have something to do with the mechanics of the procedure.

....and finally, what kind of leveler do you use?





dcs shooters:

quote:Originally posted by dcs shooters
I use a Tasco like perry has. Like he says if the scope is above the bore, you can square up the scope to it. You might have to rotate both a little to do it. I've been using mine since the mid '70,s.



So are you saying that once the vertical lines of the collimator and the scope are adjusted so that they line up, the scope is square to the action of the rifle.?.? I'm having some difficulty grasping this...it almost seems to me as if you could twist both of them 5 degrees to the right and they'd still line up.?.?
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Comments

7 comments

Date Votes
  • tsr1965
    ECC,

    An optical collumnator works on the theory that the scope is mounted to the centerline of the gun's barrel/reciever. That takes into account the holes are drilled and tapped, perfectly on the center of the reciever, and the thru holes in the bases are on center of the base, as are the rings, and lastly, when the reticle is centered in the scope. It all in theory should line up, directly dead center over the centerline of the bore and reciever. The collumnator is then set so the vertical centerline converges where the crosshairs meet, and secured not to move. The scope is then rotated in the rings so the crosshairs, both vertical, and horizontal, parralel the the lines in the collumnator. Like I said...it is based on the theory of minimal or "0" tolerence stack ups. It all in theory works out, but I still like my protractor level.

    Best
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  • perry shooter
    Maybe I have been lucky but never had a problem in even the smallest amount after I started using mine I still hate the old weavers That have a hook and screws are only on one side they turn the scope as you tighten the rings then when when you start with it slightly turned that is the very time the scope does NOT turn. [:(!]
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  • dcs shooters
    ECC, I can't explain how it works any better than TSR just did.
    I've been using mine for over 30yrs. now, and it works.
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  • He Dog
    quote:I'm having some difficulty grasping this...it almost seems to me as if you could twist both of them 5 degrees to the right and they'd still line up.?.?

    Think about this Eric. The collimator is clamped on the spud which is stuck in the barrel. Now imagine a clock face with the minute hand at 12:00. Now rotate that hand to 1:00. That is what the collimator does, because it rises above the line of the bore, while the scope can spin within the rings, it cannot rotate with the collimator and only lines up with it TDC. And yes, they can appear to be perfectly lined up and the reticle still be a touch canted. The leveler I use, Let's see...Here you go, but note it works on bolt rifes: http://www.midwayusa.com/viewProduct/?productNumber=360476 The Wheeler is probably the best.
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  • FEENIX
    Eric,

    I too use a collimator and have a couple of sets with various arbors (fixed and expandable).

    Here's an article on collimator that might help.

    http://www.shootingtimes.com/optics/ST_collimator_200904/index.html

    Good luck!

    Ed
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  • Permanently deleted user
    quote:Originally posted by He Dog
    quote:I'm having some difficulty grasping this...it almost seems to me as if you could twist both of them 5 degrees to the right and they'd still line up.?.?

    Think about this Eric. The collimator is clamped on the spud which is stuck in the barrel. Now imagine a clock face with the minute hand at 12:00. Now rotate that hand to 1:00. That is what the collimator does, because it rises above the line of the bore, while the scope can spin within the rings, it cannot rotate with the collimator and only lines up with it TDC. And yes, they can appear to be perfectly lined up and the reticle still be a touch canted. The leveler I use, Let's see...Here you go, but note it works on bolt rifes: http://www.midwayusa.com/viewProduct/?productNumber=360476 The Wheeler is probably the best.



    That is the one I've been using...and I have not been too impressed with it...in my experience, it still leaves a lot to guess work. Thanks for the other info!
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  • FEENIX
    Eric,

    I use Wheeler Engineering level-level-level ...

    http://www.youtube.com/watch?v=rIjQz6nahrw

    http://www.youtube.com/watch?v=G8A2jczcKHU

    I understand it's not for everyone or work on all actions/scope but it has worked for me thus far.

    Good luck!

    Ed
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