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Please help me understand MOA

 
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  #8  
Old 12-20-2009, 02:54 PM
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Re: Please help me understand MOA

Montanarifleman, it's easier to stop thinking in clicks and start thinking in MOA. Less counting. Help me understand how that's possible irregardless of conversion equations...whether it 29 or 32 don't you still have to count clicks if the scope has 1/4" clicks? Not disputing just trying to understand.
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  #9  
Old 12-20-2009, 04:43 PM
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Re: Please help me understand MOA

Quote:
Quote:
Originally Posted by Chas1 View Post
Montanarifleman, it's easier to stop thinking in clicks and start thinking in MOA. Less counting. Help me understand how that's possible irregardless of conversion equations...whether it 29 or 32 don't you still have to count clicks if the scope has 1/4" clicks? Not disputing just trying to understand.
Good question and here's how I think about it. If you have to dial up, let's say 8.6 MOA, that equates to 34 clicks. Turrets aren't numbered by clicks but they are numbered by MOA and usually 1/4 increments. In this case the only counting I have to do is 2 clicks past 8. If I'm thinking in clicks, I have to carefully count each click up to 34. Also (and I'm not an expert on all the ballistic software out there, but most software is probably going to give readouts in MOA and not clicks. If it does give it in clicks that's just more redundant info.

So it's a lot easier for me to just look at the MOA adjustment and dial to that number and dial another couple of clicks.

Hope that's understandable

Last edited by MontanaRifleman; 12-21-2009 at 12:20 AM.
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  #10  
Old 12-20-2009, 04:44 PM
KRP KRP is offline
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Re: Please help me understand MOA

Quote:
Originally Posted by Chas1 View Post
Montanarifleman, it's easier to stop thinking in clicks and start thinking in MOA. Less counting. Help me understand how that's possible irregardless of conversion equations...whether it 29 or 32 don't you still have to count clicks if the scope has 1/4" clicks? Not disputing just trying to understand.
The scope has minute(or inch or mil) graduations on the turret. If you need to come up 8 minutes, just turn to the 8 on the turret. A minute is a minute is a minute, regardless of distance, etc.. You do have to keep track as you make full revolutions and do a little math but coming up 21.75 minutes is easier to me than counting out 87 "clicks". Numbers are just pulled out of the air for examples.

That question was directed at MontanaRifleman and he beat me to it with a little more concise explanation.

Last edited by KRP; 12-20-2009 at 05:06 PM.
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  #11  
Old 12-20-2009, 05:30 PM
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Re: Please help me understand MOA

I really appreciate all the help and I am also glad others are benefiting from this post. BUT im still having a hard time understanding how you come up with your final MOA adjustment? Can someone please show the math step by step? I do understand now how to make your MOA adjustments versus counting each "click" thanks to you guys in this post.

Thanks again,
Nick
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  #12  
Old 12-20-2009, 05:43 PM
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Re: Please help me understand MOA

KRP caught my mistake, How I came up with 7.25 moa is beyond me! now say you would dial in 29 clicks, or 7.25 MOA into the scope and take the shot at 500 yards.
7.25X1.0473x5= 37.9", you were originaly 41.6" low so POI would be 3.7" low at 500, might not matter but, if you keep everything you can control as close as possible, then your chances of a first round hit are better since your data is right and all you have to worry about is the 12-15 FPS ES of your load, the effect (although minimal, but still there) of humidity, and a couple tenths of an inch of bar pressure, you can't control everything but keep your data as accurate as possible.
RR
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  #13  
Old 12-20-2009, 05:54 PM
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Re: Please help me understand MOA

So counting moa versus clicks only works if your scope has moa numbers...that I understand and I guess that was in mind when the advice was given to count moa and not clicks but if a scope has no moa numbers and just 1/4" increments then I guess you'd still have to count clicks...correct???
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  #14  
Old 12-20-2009, 06:07 PM
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Re: Please help me understand MOA

Niko,
I'm not real good explaining things but I'll try,

Lets look at it like this, I'm on my favorite crossing, I've glassed a doe feeding in a clearing at 960 yards, I'm shooting my 7mm Allen Mag, running a 160 accubond at 3575 fps with an actual BC of .62, now all my data is loaded into exbal and it'll tell me how many MOA to set for the shot but I'll try to explain it.


At 960 yards I am -132.5" from my 300 yard zero, so I take MOA (1.0473) and multiply it by the range in hundreds of yards.
1.0473x9.6= 10.05" so 1 MOA at 960 yards is 10"so divide 132.5 by MOA at 960 yards and you come up with the final elevation adjustment
132.5 divided by 10= 13.25 MOA to make zero at 960 yards

I made a shot once at 1350 yards, I was -360.5" from my 300 yard zero
1.0473x13.5= 14.1" or round it off to 14" so 14" is 1 MOA at 1350 yards
360.5 divided by 14" = 25.75 MOA was the final elevation adjustment
RR
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