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Point of Aim vs. Point of Impact

 
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  #1  
Old 11-22-2010, 08:55 AM
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Point of Aim vs. Point of Impact

I have a Remington 700 Long Action Sendero .338 RUM, Zeiss Diavari 6-24x56, Badger Ordinance 0 cant base with .035 in shims under the back base, Badger Ordinance Rings. My point of aim to point of impact is a difference of 11 inches down @ 50 yds. What can I do to achieve max scope elevation adjustments and be dead on at 100 yds. Would a 45 MOA base work better?

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Old 11-22-2010, 09:10 AM
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Re: Point of Aim vs. Point of Impact

To achieve what you would like to do, you need to put heavier shims (make sure you shim the front so that it stays linear when tightening your screws) or go to a minimum base cant of 20MOA. 45MOA may be to much and give you a farther zero.

Tank
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Old 11-22-2010, 10:59 AM
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Re: Point of Aim vs. Point of Impact

Thanks Tank. Do you know what .035 inches is in MOA? I was told .010 = 1 Moa.
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Old 11-22-2010, 11:16 AM
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Re: Point of Aim vs. Point of Impact

Quote:
Originally Posted by jcmckinney1 View Post
Thanks Tank. Do you know what .035 inches is in MOA? I was told .010 = 1 Moa.
I couldn't tell ya. I am extremely math deficient! It would be best to ask a gun smith or a rifle builder.

Tank
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Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

Friends don't let friends develop canonitis!-chucknbach

arguing over the internet is like the special Olympics....even if you win, you are still...special!
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Old 11-22-2010, 12:51 PM
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Re: Point of Aim vs. Point of Impact

You should be able to get close by dividing 3600 inches ( for 100 yards ) and the distance between scope base screws in inches, then multiply times your shim thickness.

eg: if the screws are 3 inches apart and you have a 0.010 shim

3600 / 3 = 1200 * 0.010 = 12 inches.

edge.
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Old 11-22-2010, 07:22 PM
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Re: Point of Aim vs. Point of Impact

For it to be that far off I tend to think that you have a problem with the bases you have on the gun. I think you should be able to find bases that would not need shimmed.
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Old 11-23-2010, 08:32 AM
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Re: Point of Aim vs. Point of Impact

I may have missed your point!

That scope has about 56 MOA of vertical adjustment.
Where is it set now?

IMO, for maximum long distance shooting it should be near the bottom DOWN adjustment.
Personally I would stay at least a few clicks off of bottom to be kind to the mechanism.

In a perfect world that should mean that you need about 25 MOA+- of cant in the scope.

If I guess that your base screws are 4 inches apart you would have 3600 / 4 = 900
Round it off to 25 inches + about 2 inches of drop = 27 inches

27 / 900 = 0.030 shim

The world is rarely perfect, but you have a shim in place that "should" have gotten you close. It seems strange that it should be off by 20 inches....unless your scope is not adjusted fully or the distance between base screws is off wildly ( which I only guessed at ).


edge.
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