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scope adjusments

I was just reading another post and it has me wondering now. I have mostly Nikon scopes. the web site lists them as 1/4 MOA while the turret is printed as 1/4" anyone have any idea what one it is?
 
1 Minuet Of Angle (MOA) is equal to 1.047” at 100 yards. Or 1” is equal to .995 MOA at 100 yards. In short, an MOA and an inch are the same. So a ¼ MOA is the same as a ¼”.

To put this in prospective 1 MOA at 1000 yards is 10.47”. Or a difference between the two at 1000 yards is only a ½ inch.
 
Sounds like the same as with Sightron. Older Sightrons (pre 2011) were marked 1/4", this year's models are marked 1/4 MOA. And there is a difference of 4 clicks between the two scopes at 1000 yards. A 10" difference at 1000 yards.
Glo, you need to re-check your math. If you set a 1/4" scope and a 1/4 MOA scope to "24" and shoot at 1000 yards, you will see a 10" difference in POI.
 
Apples to oranges?

glo is correct in the concept. If a person has a scope zeroed at 1000 yards and makes a 4 click adjustment, the 1/4 MOA scope will move .47" more. That is, if we assume that whatever is on the cap is truly what it adjusts. I have a Leupold that runs 94% of the indicated MOA and shoots really good (I won our summer 600 yard league with it).

On the other hand, Nomad also has a point. If someone dials enough change, the tolerance (.047" @ 100 yards - .47" @ 1000) will stack up. The total error @ 1000 yards comes out to 11.28" for a 24 MOA dial-up

Long and short - both right, just different ways of expressing the same idea. For me, I'd take 1/4" (if it truly is) over 1/4 MOA for target shooting. It is simpler math when making adjustments against concentric circles of known size.
 
Don't they have 1/4" clicks,, but 1/4 MOA as the numbers on the side.
So the scope actually has two measurements available.
1/4 inch "Clicks" at 100,,
1/4 MOA hash marks,,
 
If the guy I spoke to at Sightron knows what he is talking about, up until this year their scopes marked 1/4" moved POI at 100 yards by 1" with four clicks. And as of 2011, the scopes are marked in MOA and four clicks moves the POI at 100 yards by 1.0472".

On a side note, a ballistics program that I have (written by Peter Jackson) states that Leopold uses 1.05" for MOA and NightForce uses 1.09". I have no idea why Nightforce would use 1.09", if indeed that is really true.
 
But, my 20 year old Leupold that just got new adjustment mechanisms moves the POI 29.85" for a 30 "MOA" adjustment at 100 yards (measured in feet [300] to the 1/4" using the scope center as reference).

Assuming that my gun groups reasonably (it does less than 1/2" with everything) the most I could reasonably be off is 1/4" from the adjusted center. So, I am looking at a 30" adjustment for 30 "MOA" at 100 yards. Is my scope bad? I doubt it. Some other Leupold owners are getting similar results.

The only down side is that come-ups must be corrected at 94% (e.g. a 32.5 MOA adjustment to get to 1000 yards is 34.5 on the dial) I think that is why most US snipers have their own personal DOPE (drop on previous experience) for their rifles. Scopes vary a lot!

I'm thinking that Jackson's program may be right about what the assumed value of 1 MOA is for each manufacturer, but that doesn't change the need for finding out how one's personal scope behaves.
 
Bear in mind I was just repeating what was stated on a ballistics program. And 1.05 is mighty close to 1.047 as far as I'm concerned. But I am baffled about the 1.09 number for NightForce. I would love hear either a denial or an explanation from NightForce.
 

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