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Parallax question

 
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  #1  
Old 08-04-2012, 09:01 PM
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Join Date: Apr 2012
Location: Michigan
Posts: 215
Parallax question

So my gunsmith says my scope is out of parallax and that is part of my accuracy issue. Not wanting to appear a dummy to him I choose to look the idiot I am to you guys.
What does he mean? He said to send it in to Leupold and they would set it to where it should be. How does that effect my groups?
Thanks so much.
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  #2  
Old 08-04-2012, 11:04 PM
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Join Date: Jan 2005
Location: Searcy, Arkansas
Posts: 700
Re: Parallax question

canvsbk,

What model scope is it, does it have an adjustable parallax?

If it does not have a parallax adjustment (either a ring at the front objective or a knob on the opposite side of the scope from your windage knob) your scope would be a "fixed" parallax scope. Most fixed scopes will have the parallax set at somewhere between 100 to 200 yards. At whatever range the parallax is set, that is the ONLY range the parallax is actually perfect. You will see the worst effects at distances closer than you will further than the parallax is set. To test parallax, set your rifle up in solid rest. Sight on a small target, with your cheek still on the stock, nod your head up and down a bit. If the parallax is right the crosshairs will stay centered, if it is off, the crosshairs will move up and down as you move your head even though the rifle is steady.

I ran into an issue with a Leupold rimfire scope recently that could be what you are seeing. The problem I had was when I got the parallax set for a particular yardage the scope was blurry, when the scope was clear the parallax was off. It turned out that the eye piece needed focused. I set the scope up for a specific distance, then using the "head nod" method turned my parallax adjustment until the parallax was good, then I turned the rear eye piece focal adjustment until the scope was in "focus" Now the "focus" and "parallax" both match up close or far.

Hope this helps, give us more specifics and maybe someone can help you sort out the problem.
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  #3  
Old 08-05-2012, 08:13 AM
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Join Date: Apr 2012
Location: Michigan
Posts: 215
Re: Parallax question

The scope is a Leupold 4.5x14 / vx2. It's on a Ruger .25-06 that I had intended to use for pronghorns this fall but I've really been struggling with accuracy on this rifle so I turned it over to my smith.
After he scoped the bore and did a trigger job and removed the heavy build up of copper (I was positive I had it spotless) he was able to shoot groups right at 3/4 of an inch which I can live with.
Besides the fact that the bore looks like I've been shooting rocks down it he said the parallax was off about an inch @ 100 yds. He said getting it set correct would help some too, therefore my question in the op.
After just 210 shots, none at max, the throat is almost gone on this rifle and needless to say I'm more than disappointed. I think I can see a new barrel in my not too distant future.
Thanks for your explanation, I'll get it handled.
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