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Leupold Mk4

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badshooter View Drop Down
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Joined: August/10/2006
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    Posted: August/17/2009 at 23:20
I recently got a Mk4 3.5-10 with the M3 turret. I have read that I'm not to put it on a 20MOA base, but I already hade the bse installed.  I got my rifle zeroed at 100yds and it still has all the movement to 1000yds, I guess, I don't have 1000yds to check it with. 
Why is it that this scope shouldn't be mounted on a 20MOA base. The rifle is a SPS-T in .308.
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Mike McDonald View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike McDonald Quote  Post ReplyReply Direct Link To This Post Posted: August/18/2009 at 07:03
That modelhas about 55 moa elevation travel, and with some base/ring combinations when using a 100 yard zero there may not be enough remaining elevation travel to go to 1000yards.
For a 308 win that should be from 33 to 43 moa depending on the rifle and ammunition.
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badshooter View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badshooter Quote  Post ReplyReply Direct Link To This Post Posted: August/18/2009 at 09:42
I bought this scope used, and it was set with the turret almost all the way up. I only had about 3/4 turn before it ran out of adjustment.  I boresighted it and lowered the dial about 1 full turn. I figured with a 20MOA base, I shouldn't be able to use the whole 1000yd adjustment.
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