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Crosshair levelling

 
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  #15  
Old 10-14-2012, 02:44 PM
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Re: Crosshair levelling

Wheeler Engineering Professional Reticle Leveling System

I just bought one of these a couple of weeks ago...been shooting LR for years with scopes only "eyeball" mounted and only had minor issues but figured this tool would simplify things...and it did.

Checked the scopes on all my long and medium range rifles (5 of them)...all were unlevel to some degree, some worse than others but none were very bad at all.

Mounted the Vortex on my new 30-06 with this kit, used the front scope base to level the rifle..."shot the box" at 200 yards, perfect square.

I believe a lot of folks tend to overthink things sometimes...these neat lil kits speed up proper mounting in that you don't have to get yourself crosseyed from looking through the scope to level it and they ARE worth the money.

The caveat is...in all those years of shooting, up until the last 5 years....I never dialed a scope, hell, never owned a scope that cost over $200...the came the internet (for me), first I bought an S&B (overkill, very nice scope, but not what I expected....I think I expected something along the lines of Hubble for that price tag....found I didn't need it, sold it), bought a $600 Leupold (another letdown, nice scope, just didn't see the $600 price tag as worth it...sold it)...had some good luck with Nikons in the $300-$400 range...the last one I bought was the Vortex Viper HS (non LR) 4-16x44mm for $500...its a little early to tell but I think this scope is the "sweet spot"...does the job at a reasonable price.

Not dialing explains why I never had much trouble with slightly unlevel reticles...but so far the Vortex seems good to go and was bench mounted and leveled.
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  #16  
Old 10-14-2012, 02:48 PM
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Re: Crosshair levelling

Quote:
Originally Posted by Joe King View Post
you are meaning at 1 set range not over various ranges correct?
Correct Joe. I usually do this testing at 100 yds to minimize variables.
db
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  #17  
Old 10-14-2012, 03:09 PM
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Re: Crosshair levelling

Several ways to skin a cat, this is the way I do it

I use an EXD device to get the cant out of the rifle when it is in the vise

Brownells Search : Search Results for "exd" - World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools - BROWNELLS




it aligns the bore and the scope centerline so that the cant is removed

While the rifle is in the vise I aim it out the door to a 4' level sitting on a fence 30 yards away. Rotate the scope to align the crosshairs while maintaining the EXD bubble level.

Good time to install a ScopLevel like Mike suggested

If you are concerned about an awkward hold because you like to hold your rifle at a cant when shooting, I wouldn't be. The difference will be small and it will become natural to hold your rifle uncanted with the ScopLevel which folds down when not in use

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  #18  
Old 10-14-2012, 03:52 PM
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Join Date: Dec 2011
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Re: Crosshair levelling

Quote:
Originally Posted by Mikecr View Post
Neither scope rail nor turret top directly correspond to either crosshair, or elevation adjustment.
Without precipitating a war here, please elaborate on that comment I want to know how you reached that conclusion and your factual analysis, not a statement based on opinion, but actual facts and geometry.

The mechanics of the optic directly correspond to the position of the reticle in relationship to the center axis of the gun, always, that is a constant and that constant, in order to be at right angles to the vertical axis, must also be parallel to the horizontal plane of the receiver and rail (so long as the rail to receiver mounting points are drilled and tapped on centerline of the receiver and the rail is drilled on center and the mounting holes are parallel to the rail's edge.....

I want to know how the rail or the top of the elevation turret isn't directly impacted by the above mechanics.

I have to hear this.......
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  #19  
Old 10-14-2012, 04:00 PM
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Re: Crosshair levelling

I'm going to emphasize that the accuracy of any operation that involves squaring of the reticle cross marks (etched or inlaid) is only as good as the spirit level (vial) thats used to determine if, in fact, level is level and consumer level vials with painted on indicator marks and plastic tubes aren't all that good in the first place.

Accuracy in any operation is only as good as the most accurate device employed in that operation and no better.

For our use, consumer grade vials are fine but in the grand scheme of things, those vials are like a dirt road compared to a pool table top.....
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  #20  
Old 10-14-2012, 05:56 PM
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Re: Crosshair levelling

Quote:
Originally Posted by SidecarFlip View Post
I want to know how the rail or the top of the elevation turret isn't directly impacted by the above mechanics.
I never said the moon & the stars didn't impact reticle relationships.
What I believe that I've implied is that they JUST DON'T MATTER.
What matters is the reticle or adjustment plumb, and these are independent of all else, including the gun.

I do the same as Woods(also with an EXD), for bench guns that are fired free recoil, off level bench rests, with exception that I level elevation adjustment instead of the crosshair.
I only hold off for wind.
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  #21  
Old 10-14-2012, 06:11 PM
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Re: Crosshair levelling

Quote:
Originally Posted by Mikecr View Post
I never said the moon & the stars didn't impact reticle relationships.
What I believe that I've implied is that they JUST DON'T MATTER.
What matters is the reticle or adjustment plumb, and these are independent of all else, including the gun.

I do the same as Woods(also with an EXD), for bench guns that are fired free recoil, off level bench rests, with exception that I level elevation adjustment instead of the crosshair.
I only hold off for wind.
I don't see anything implied.....
"Neither scope rail nor turret top directly correspond to either crosshair, or elevation adjustment."
But rather a statement and it certainly does matter, in fact, the farther away the PIO, the more misalignment scope reticle cant causes. It certainly does matter and it (misalignment) compounds itself as the range increases.

In fact, they do..... in as much as the scope reticle is mechanically married to both the elevation erector and the scope body is mechanically married to the rail/ring mounts and the receiver.

The erector mechanism for the elevation operates in a vertical plane only as does the windage adjustment...operates in a horizontial plane.

Whatever blows your dress up I guess.
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