Scope adjustment numbers?

[ngt]

So I have a Nikon 6722 prostaff 3x9 40 scope. I like it. I have it on my ruger 10 22. I am looking through the manual today and see there's a 6725 prostaff "Rimfire" 3x9 40 scope that's pretty much exactly like this one, but the adjustments are 1/4" per click at 50 yards on the 6725 and 1/4" per click at 100 yards for the 6722. I'm new to all of this, so could someone explain what the difference of this is as far as dialing in the scope and accuracy? Not sure how much of a difference this makes, although I guess I have the wrong one for the gun I'm using, if there was one specifically made for a .22 LR .

thoughts?

 

[GunnyGene]

So I have a Nikon 6722 prostaff 3x9 40 scope. I like it. I have it on my ruger 10 22. I am looking through the manual today and see there's a 6725 prostaff "Rimfire" 3x9 40 scope that's pretty much exactly like this one, but the adjustments are 1/4" per click at 50 yards on the 6725 and 1/4" per click at 100 yards for the 6722. I'm new to all of this, so could someone explain what the difference of this is as far as dialing in the scope and accuracy? Not sure how much of a difference this makes, although I guess I have the wrong one for the gun I'm using, if there was one specifically made for a .22 LR .

thoughts?

Has to do with the parallax setting in the different scopes. Both are 1/4 MOA (Minute of Arc - One arc minute=1/60th of a degree), and either one is fine for your rifle.

Rex has several videos which go into detail regarding scopes, primarily the high dollar extreme long range variety, but the principles are the same. Scroll down the playlist, grab a beer and enjoy. http://www.youtube.com/watch?v=pwG-D0HjCBQ&list=PLJUaiRIEduNXoal2_PkBZi0vDCIcEPxUn

 

[gmartinnc]

Normally, a scope without a parallax adjustment made for a center fire rifle, is set to be parallax free at around 100 yards.
One made specifically for a 22, will be much closer.

 

[Mobuck]

"but the adjustments are 1/4" per click at 50 yards on the 6725 and 1/4" per click at 100 yards for the 6722."
This question and it's answer have NOTHING to do with parallax. 1/4" per click @ 50 yards would be different than 1/4" per click @100 yards(twice as much)
The rimfire version (might) have a different parallax distance or might just be a marketing ploy. Parallax adjusted to a certain range will compensate for changes in eye position behind the ocular and may or may not affect your use. For plinking at large targets like pop cans or clay birds(30-50') and an experienced shooter who positions his head/eye consistently behind the scope, parallax will not be an issue. For a small game hunter who may take shots at small targets at medium range(30-50 yards) from positions which cause eye misalignment, parallax may cause crosshair displacement sufficient to miss the intended point of impact.

 

[gmartinnc]

"but the adjustments are 1/4" per click at 50 yards on the 6725 and 1/4" per click at 100 yards for the 6722."
This question and it's answer have NOTHING to do with parallax. 1/4" per click @ 50 yards would be different than 1/4" per click @100 yards(twice as much)
The rimfire version (might) have a different parallax distance or might just be a marketing ploy. Parallax adjusted to a certain range will compensate for changes in eye position behind the ocular and may or may not affect your use. For plinking at large targets like pop cans or clay birds(30-50') and an experienced shooter who positions his head/eye consistently behind the scope, parallax will not be an issue. For a small game hunter who may take shots at small targets at medium range(30-50 yards) from positions which cause eye misalignment, parallax may cause crosshair displacement sufficient to miss the intended point of impact.

The op mentioned that he has learned there is a dedicated 22 scope, and is thinking he may have bought the wrong one for his rifle. Then goes on to talk about the only difference that he knows about between the two. The click adjustment is really a non issue once the scope is zeroed, and I intended to let the op know about the other difference.
Any dedicated 22 scope really should have the parallax set much closer than a centerfire rifle scope, and if it isn't, it will cause a problem target shooting at the shorter distances 22's are shot from.
If he is planning on serious target shooting, he really needs a scope with adjustable parallax. He was talking recently in another thread about upgrading both his trigger and his barrel, so that left me with the impression this may be what he is doing. BTW, in that same thread he mentioned that he is not a experienced shooter.

 

[Precision32]

The difference is the first scope has a 1/2 MINUTE OF ANGLE click adjustments and the second has a 1/4 MINUTE OF ANGLE click adjustment. So at 100 yards the first scope will adjust Point of Impact 1/2" per click, the second will adjust 1/4" at 100 yards.

IMHO your rifle has to be properly set up for scope use. Your rifle should be set up so that when you get into position your head is at the proper distance from the scope that you have the correct eye relief for the scope you use. Second the comb of the rifle should be high enough that your eye is exactly lined up with the center of the scope. When these two conditions are met, parallax does not come into play.

This is how I set my scoped rifles up. When I sling up, my eye is centered perfectly in the scope center and I do not have to move my head back or forth to get a clear, sharp edge between the black ring of the scope tube and the image. If you see a fuzzy edge at the scope tube, you do not have proper eye relief and you will have problems with parallax and flyers.

 

[ngt]

Yeah I'm REALLY new to all of this, so any information, pretty much about any aspect of rifle shooting, is appreciated. Sometimes confusing, but appreciated. My thought about the scope was that one of them would be able to adjust at smaller increments and therefor get centered to dead on better. Just a thought. My scope's manual says "4 inches from the scope" is where my eye should be. I have a tough time setting up and being at that distance. I seem to have to get a bit closer to get a wider view in the scope. I was hitting nickel size targets at 50 yard pretty consistently at the end of the day on Friday, but at 100 yards it was all over the place, by a lot. I was adjusting with the circles, but it was WAY off in random directions.

 

[gmartinnc]

If you have no provision for adjusting the parallax then you had BETTER position your eye at the same place for each shot.
But if you aren't shooting from a rest, you couldn't see the parallax to adjust it out anyway. Then I suppose, eye position would become more critical. I don't shoot 22's anyway and probably should have stayed out of this discussion altogether, but was just trying to help educate a new shooter.
According to the info on Nikon's site, the 6725 is factory adjusted to be parallax free at 50 yards and the 6722 is set to be parallax free at 100. Getting the proper one for the rifle can only be a good thing, if for no other reason than the BDC retical, which is probably set up for for the 22 cartridge.
http://www.nikonsportoptics.com/en/Nikon-Products/Riflescopes/6722/ProStaff-3-9x40-Matte-BDC.html
http://www.nikonsportoptics.com/Nikon-Products/Product/Scopes/6725/3-9x40_Rimfire.html