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Zeiss and Vortex Adjustment with 20 MOA

 
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  #1  
Old 04-13-2012, 12:12 PM
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Zeiss and Vortex Adjustment with 20 MOA

I have a zeiss 4.5x14x44 and on the Zeiss website it says that it has a square adjustment range of 42.8 inches. With this would I be able to use a 20 moa base with a 200 yard zero?

I also have a Vortex 4-15-50 Viper HS. On their site it says there is 50 moa adjustment. With this will I be able to also get a 200 yard zero with a 20 moa base?

Thanks
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  #2  
Old 04-13-2012, 09:59 PM
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In theory, yes, the Zeiss can get there with 42 MOA. However, manufacturing tolerances can be a problem. With 42 MOA adjustment, you don't have much room for error. You've got about 6 MOA to spare, to be precise. In a production rifle, a zero MOA base could easily be vertically mis-aligned from the bore by more than 8 MOA.

You may have to shim or bed your base 10 or 20 thou to correct that error. When installing the scope, I recommend you you use an arbor boresight collimator to assess base alignment and dial in your base. I would not hesitate to do it, because the Zeiss glass is worth the effort.

Alternately, if you use a mildot reticle, you can zero at 200 yds using one of the dots above the crosshairs. You can add 10 or so MOA that way.
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  #3  
Old 10-25-2012, 02:31 PM
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Re: Zeiss and Vortex Adjustment with 20 MOA

Could you possibly bottom out a Zeiss Conquest 6.5-20x50 with a 100 yard zero using a 20 MOA Picatinny Rail?

My IWLA fellow member can only adjust the turret to an 1 inch high (he can not adjust the turret any further down) at 100 yards with his Zeiss Conquest 6.5-20x50 and he has the scope on a 20 MOA Picatinny Rail.

The Zeiss website says the 6.5-20x50 Conquest has a square adjustment range of 45.4 inches.

Thanks
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Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

Remington 700 Sendero SF 7mm STW
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

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Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope
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Old 11-11-2012, 08:22 PM
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Re: Zeiss and Vortex Adjustment with 20 MOA

Update:

I called Zeiss about two weeks ago and they said they recommend a 20 MOA rail. But when I told them the cailber was a 7mm STW and shooting out 140 grain bullets at least 3,300 fps at the muzzle they said it would not work because the bullet was going too fast.

I suggested to them what if I replaced the 20 MOA rail with a 15 MOA rail. They said it would work then.
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Remington 700 Sendero SF 7mm STW
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

Remington 700 Sendero SF 7mm STW
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope

Remington 700 LSS .257 Weatherby Magnum
Vortex Viper PST 6-24x50 FFP EBR-1 MOA Reticle Scope
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  #5  
Old 11-14-2012, 08:39 AM
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Re: Zeiss and Vortex Adjustment with 20 MOA

Quote:
Originally Posted by gamehawker View Post
Update:

I called Zeiss about two weeks ago and they said they recommend a 20 MOA rail. But when I told them the cailber was a 7mm STW and shooting out 140 grain bullets at least 3,300 fps at the muzzle they said it would not work because the bullet was going too fast.

I suggested to them what if I replaced the 20 MOA rail with a 15 MOA rail. They said it would work then.

EGW 15 MOA's are all I have because I dont need the range that a 20 MOA rail might give me
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