Leupold Mark 4 owners:


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cchurchi
October 20, 2008, 12:19 PM
I have a Leupold Mark 4 (6.5-20 X 50) and I am wondering if 4 clicks on the turret = 1 inch of impact movement at 100 yards or 1.047 inches?

So the question is: are these scopes shooters MOA or True MOA?

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Tarvis
October 20, 2008, 12:29 PM
Not that I know, but I wouldn't be surprised if all scopes were true MOA, and phrasing it as 1 inch at 100 yards is for ease of thought. You could contact Leupold as well.

hksw
October 20, 2008, 01:12 PM
Leupold officially states the adjustments for the Mark 4s as MOA which I take to be true MOA (unless you get the metric ones which are 0.5cm @ 100m).

EShell
October 20, 2008, 01:16 PM
The several Mark 4s I have are all "true MOA".

The most simple way to prove this is to perform a box test. Either dial on 10 moa up/over/down/back at 100 yards, or 20 moa up/over/down/back at 50 yards. Either method should net a 10.5" box as below, shot with my MK4 4.5-14x50.

Here, I shot one at 100 at the black dot, fine adjusted my zero and shot another to verify, then dialed up 10 MOA and shot two, right 10/shot two, down 10/shot two, then left 10 and shot two back into the dot:

http://www.pillicustomhomes.com/eshell/213/LTR-BoxTest-8-28-08.jpg

cchurchi
October 20, 2008, 01:29 PM
Awesome! However, shouldn't the box size have been 10.47 inches per side?



Ha Ha, just kidding! Thanks for all the help. I have been using this external ballistics calculator:

http://www.biggameinfo.com/BalCalc.aspx

and then importing the data to an excel file I created to automaticly generate some simple range cards that I laminate and keep with my rangefinder. The site above uses true MOA so I wanted to be sure which MOA the Mark 4 scopes were using. Originally, I had a conversion I was using to convert the data from the site above from true MOA to shooters MOA, but I will elimate that function if a box test confirms that my Mark 4 is true MOA, as it looks like it is.

JWarren
October 20, 2008, 05:29 PM
According to mine and everything I've read, the M3 turrents are on MOA movement, not inches.

-- John

atblis
October 20, 2008, 06:46 PM
The adjustments aren't that accurate anyways.

EShell
October 20, 2008, 07:05 PM
Aren't what accurate? What exactly do you mean?

We spin them up to 40 MOA (.308/175 to 1,000 yards with a 100 yard base zero) and they track fine.

There are some cases in older Loopys where the click values will lose some linearity as large amounts of elevation is dialed on, but this is why we actually shoot long range data and don't rely on computer fantasy for our dope. Once we have our proven data, the click values are reliable and repeatable, part of why these scopes cost around a grand.

HB
October 20, 2008, 07:30 PM
The adjustments aren't that accurate anyways.
No, you are not that accurate... and neither is your rifle :neener:

atblis
October 20, 2008, 10:02 PM
I was thinking small small adjustments. Yeah, probably matters when dialing a lot.

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