Parallax Question

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JohnB-40

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I need a little help for my old dyslexic brain to understand parallax free distances in a scope. After an hour on line,I'm none the wiser on this question and hope someone here can answer it.....
What (if any) problem would there be using a 1-4x20 shotgun scope with the parallax set at 75 yards, mounted on a rifle for distances out to 100-150 yards max?
 
As LoonWulf says nothing to worry about. I shoot 22 lr rifles at a hundred yards with scopes with 50 yard parallax. If there is an issue I can’t see it. If I was shooting competition it would be a different story. For hunting or general practice your good.
 
For normal hunting distances it's a moot point, I've never owned an adjustable parallax scope until I started shooting Field Target and there it's mainly used for range finding
 
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As long as you're using the scope properly parallax isn't an issue at all. It only comes into play if you don't have your eye directly in line with the scope. Even then it is a minor issue.

From a Leupold owners manual.

Parallax is the apparent movement of the target relative to the reticle when you move your eye away from the center point of the eyepiece. It occurs when the target does not fall on the same optical plane as the reticle.

Maximum parallax occurs when your eye is at the very edge of the exit pupil. (Even in this unlikely event, our 4x hunting scope focused for 150 yards has a maximum error of only 8/10ths of an inch at 500 yards.)

At short distances, the parallax effect does not affect accuracy. (Using the same 4x scope at 100 yards, the maximum error is less than 2/10ths of an inch.) It is also good to remember that, as long as you are sighting straight through the middle of the scope, or close to it, parallax will have virtually no effect on accuracy in a hunting situation
 
The only time I have noticed any issues was when using centerfire scope with 100 yard parallax on a 22lr and shooting at 25 yards. And it very well could just be my eye sight too. On teh scopes that I had parallax issues with were cheaper ones from Nikon and Simmons. And yes I had the scopes set up correctly and as looking through them correctly too.
 
I buy all my scopes with adjustable objectives simply because I like to shoot 22's at 200 yards on target and shoot for small groups. For me I want to be sure that if the groups open up that it was due to the wind, the round, or me. By using the parallax correction at two hundred yards it eliminates the prospect of me being the reason for large groups............well mostly.;) Regardless as everyone has mentioned it is not a big thing especially if you can maintain sight alignment, otherwise depending on distance there is a small deviation.
 
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