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Doing it Wrong?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/29/2013 at 22:43
ydennekb View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: November/29/2013
Location: Odessa, TX
Status: Offline
Points: 3
Okay, just bought my first MOA scope, a Vortex Crossfire 3-9x40 and mounted it on my Model 70 in 243. I was attempting to zero it today, got it to 1/2" low and 1" left. The scope says the adjustments are 1/4 MOA and I'm shooting at 100 yards so i turned it 4 clicks to the right and 2 clicks up. My next shots were 1-1/2" high and 3" to the right. 

So, are my adjustments wrong, my math wrong, am I trying to zero at the wrong distance, etc...?  For the record, I'm experienced enough that I can shoot groups instead of patterns! 
Post Options Post Options   Thanks (1) Thanks(1)     Back to Top Direct Link To This Post Posted: November/30/2013 at 01:21
Rainman View Drop Down
Optics Apprentice
Optics Apprentice
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Joined: August/25/2012
Location: Washington Stat
Status: Offline
Points: 281
Your procedures were correct.  There are several possibilities.  1. Check to make sure the scope base(s) is not loose and the ring screw are snug as well.  (Over tightened rings can also cause internal binding in the scope resulting in erratic movements.)  2. The Crossfire scope is Vortex's entry level scope and as with any maker will not offer the same lens quality or precision of more expensive models but usually not to the level you experienced.  3.  The scope could be defective.  Vortex has a stellar reputation for customer service and warranty so I'd call and discuss it with them.

I own Vortex products that have been reliable and good value purchases.  I don't own any of their scopes yet but have shot rifles with Diamondback and Viper models that performed very well and had very good glass for their price points.

From my early shooting days of owning lower priced and used scopes I picked up a habit of using an empty case head to tap lightly on the turret tops after adjustments to help settle everything in.  I also encountered scopes where simultaneous windage and elevation adjustments affected each other to the point neither adjustment was precise.  These usually aren't issues with modern scopes from reputable makers like Vortex.  Hope this helps and let us know.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 09:48
ydennekb View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: November/29/2013
Location: Odessa, TX
Status: Offline
Points: 3
Thank you for the reply.  The ring/bases are the Talley one piece type and are torqued to their specs. Copy one the entry level aspect, for what I paid for it I kind of expectes problems. I think 3. might be at play here. The adjustments seemed to be fine getting on paper but when i started running low on ammo I started adjusting windage and elevation at the same time. I think I'll go back out and give it another shot and stick to adjusting one aspect at a time.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 10:36
supertool73 View Drop Down
Optics Jedi Master
Optics Jedi Master
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Superstool

Joined: January/03/2008
Location: Utah
Status: Offline
Points: 9510
Put it in a vice or some very stable setup. Shoot 1 shot at target while aiming at bullseye. Then for 2nd shot set gun up in vice so it is pointed at the bullseye. Then while looking through your scope move the adjustments so the crosshairs now line up on the bullet hole. You can watch them move. If you do this right without moving the gun your second shot should hit the first shot (obviously this depends upon shooter, and gun accuracy.).

This can take some error out of sight in and you can typically get it sighted in perfectly in 2 or 3 shots.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 23:54
jawbone View Drop Down
Optics GrassHopper
Optics GrassHopper
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Joined: July/17/2013
Location: Washington
Status: Offline
Points: 15
Interesting that each click affected impact by 1 MOA each (i.e., 4 clicks wind = 4" horizontal movement; 2 clicks elevation = 2" vertical movement).
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