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starting an moa table/chart

by , Posted to on 07/21/2011 8:43 PM | "Quote" | "Quick Reply" |

Joined: 07/21/2011
Location: co
I have recently started shooting long range and may even soon join some competitions and wanted to make a table to tape on to my rifle as a reference. I have seen several different ways of doing it and i saw a couple where it would say things similar to 3+1, 2+3, as opposed to - 23, or -7.5 for elevation and windage adjustments. I have also notices spotters giving these numbers as well, and was wonderind if anyone could tell me what this means, and why the military also uses this as an moa adjustment.



Thanks in advance
Re: starting an moa table/chart
by on 07/21/2011 8:41 PM | Reply #1 | "Quote" | "Quick Reply" |

Joined: 01/08/2002
Location: ND
.....the military uses the force......
Re: starting an moa table/chart
by on 07/21/2011 10:05 PM | Reply #2 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 
kylepv Said:
I have recently started shooting long range and may even soon join some competitions and wanted to make a table to tape on to my rifle as a reference. I have seen several different ways of doing it and i saw a couple where it would say things similar to 3+1, 2+3, as opposed to - 23, or -7.5 for elevation and windage adjustments. I have also notices spotters giving these numbers as well, and was wonderind if anyone could tell me what this means, and why the military also uses this as an moa adjustment.



Thanks in advance

Go here and enter in necessary data:

http://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi

Study the table it spits out and it'll all make sense.

Here's a shortcut that'll get you close enough:  

1MOA = 1" @ 100yds.
1MOA = 2" @ 200yds
1MOA = 3" @ 300yds

The pattern goes on thusly.  Give or take you'll be about 1200yds before you need to know that 1MOA is actually 1.04791" @ 100yds.

Why yes indeed I can walk on water..............but I do stagger on alcohol.

Re: starting an moa table/chart
by on 07/22/2011 5:49 PM | Reply #3 | "Quote" | "Quick Reply" |

Joined: 07/21/2011
Location: co

Thanks horsager,

And thank you Jiffy for replying, funny thing because on one of the other forums ( Leupold vx 4 cds rifle scope) you posted a picture with this kind of table,

which is what i've been trying to figure out!... and i cant anywhere find what 6+2, 7+1, etc... means. I have only used just standard moa drop and am curious to see if this is a more efficient way of organizing the data. so Jiffy could you please help explain this?

Re: starting an moa table/chart
by on 07/22/2011 7:28 PM | Reply #4 | "Quote" | "Quick Reply" |

Joined: 01/08/2002
Location: ND
....that isn't mine, I copied it off the internet.

I use the force whilest engaging target. 
Re: starting an moa table/chart
by on 07/22/2011 9:21 PM | Reply #5 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 
kylepv Said:

Thanks horsager,

And thank you Jiffy for replying, funny thing because on one of the other forums ( Leupold vx 4 cds rifle scope) you posted a picture with this kind of table,

which is what i've been trying to figure out!... and i cant anywhere find what 6+2, 7+1, etc... means. I have only used just standard moa drop and am curious to see if this is a more efficient way of organizing the data. so Jiffy could you please help explain this?

If each click of of your scope adjustment = 1/4" then 1MOA = 4 clicks.  You'll notice on the above chart that the 2nd number is never higher than 3, that's because a 4th click would equal the next MOA value.  The 1st number is how many MOA, the 2nd is how many clicks past that MOA value.

On the chart above to make a hit @ 400yds you'd add 4MOA of elevation.  @ 500yds you'd add 6.5MOA or 6MOA + 2 more clicks.  600yds requires 9MOA + 2 CLICKS.

If you don't understand it now, give up.

Why yes indeed I can walk on water..............but I do stagger on alcohol.

Re: starting an moa table/chart
by on 07/22/2011 10:02 PM | Reply #6 | "Quote" | "Quick Reply" |

Joined: 08/29/2009
Location: ND
OK  I'll bite.  What are the other three columns?

                                                                                                                         

Re: starting an moa table/chart
by on 07/22/2011 10:10 PM | Reply #7 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 I'll guess too since that's not my chart and none of mine look like that.

Column 1:  Range
Column 2:  MOA elevation correction required
Column 3:  Mil elevation correction required
Column 4:  MOA windage correction for 10MPH full-grade crosswind
Column 5:  Mil windage correction for 10MPH full-grade crosswind

Why yes indeed I can walk on water..............but I do stagger on alcohol.

Re: starting an moa table/chart
by on 07/23/2011 02:47 AM | Reply #8 | "Quote" | "Quick Reply" |

Joined: 07/21/2011
Location: co
Thanks again Horsager,

Now that you explained it I feel really stupid. I kept thinking it would be complicated, I guess I was looking to hard when it was right there in front of me. I'll try this method and see how it works out and know at least it won't be driving me crazy everytime I here about it and as a bonus i'll actual be able to understand it.
Re: starting an moa table/chart
by on 07/23/2011 10:32 AM | Reply #9 | "Quote" | "Quick Reply" |

Joined: 01/02/2011
Location: ND
Don't feel bad, I don't know anyone who can differeniate .7 from .8 mills when shooting.  Stick with an easy moa only chart.  If you start competing you will know your course of fire.  So a chart won't be very critical.  I run the newest version of exbal on my home computer and Shooter from Bryan Litz(Berger bullets) on my smartphone(only reason I have one is to run this software).  You get some pretty great software in shooter for only $10.  I have my chart fastened to my range finder.  I don't use it much anymore because of the way shooter is setup.  I really like this software.  You have tables of range, wind, and look angle you can scroll through to change in a second.  About as fast as a chart except exact corrections for the environment.  Make sure to check your data in the field, sometimes you have to tweak your BC to get it to match exactly.


Brent
Re: starting an moa table/chart
by on 07/23/2011 1:06 PM | Reply #10 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 
blipelt Said:
Don't feel bad, I don't know anyone who can differeniate .7 from .8 mills when shooting.  
Jiffy can.  He can range with them too, scary good as confirmed via LRF.

Why yes indeed I can walk on water..............but I do stagger on alcohol.

Re: starting an moa table/chart
by on 07/23/2011 1:48 PM | Reply #11 | "Quote" | "Quick Reply" |

Joined: 08/29/2009
Location: ND
Thanks for the explanation.  i understand the MOA adjustments.  the mil adjustment is on the crosshairs?

                                                                                                                         

Re: starting an moa table/chart
by on 07/23/2011 2:23 PM | Reply #12 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 
WormWiggler Said:
Thanks for the explanation.  i understand the MOA adjustments.  the mil adjustment is on the crosshairs?

Most of the time, yes.  

Many scope manufacturers are now offering turrets that adjust in 1/10MIL "clicks" for them that wanna run Mil/Mil reticle/turrets.

Why yes indeed I can walk on water..............but I do stagger on alcohol.

Re: starting an moa table/chart
by on 07/23/2011 2:41 PM | Reply #13 | "Quote" | "Quick Reply" |

Joined: 11/19/2005
Location: ND
What I found to be the easiest was to go to G7's website and register and they have a system for MOA charts that so far has been pretty accurate.
Hunt today like there may be no tomorrow!
Re: starting an moa table/chart
by on 07/23/2011 2:51 PM | Reply #14 | "Quote" | "Quick Reply" |

Joined: 01/02/2011
Location: ND
Sorry no disrespect intended. I don't have any government training.  Wish I did though, kinda regret it now.  I tend to stick with moa adjustment and reticle.  That way makes it easier for me.

Height of target(inches)
     #moa's takes up         X 100(actually 95.5)        Should give you the distance in yards


Hardest thing with moa in my opinion is making sure you are set on the right power setting.  I just think the math is easier than calculating with mils.  I am sure it is all in what you were exposed to first.

Brent

Re: starting an moa table/chart
by on 07/23/2011 6:00 PM | Reply #15 | "Quote" | "Quick Reply" |

Joined: 08/29/2009
Location: ND
I just bought a cheap scope for my son's M4 .22LR not realizing it was this type of scope.  Now I get to learn and he gets to shoot.  Win Win

                                                                                                                         

Re: starting an moa table/chart
by on 07/23/2011 10:28 PM | Reply #16 | "Quote" | "Quick Reply" |

Joined: 08/12/2003
Location: ND
 
WormWiggler Said:
I just bought a cheap scope for my son's M4 .22LR not realizing it was this type of scope.  Now I get to learn and he gets to shoot.  Win Win
Now all you need to do is find the BC of the 22 ammo he's using, run it over a chronograph, and run yourself a reference sheet.

Why yes indeed I can walk on water..............but I do stagger on alcohol.

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Posted On: 07/21/2011 8:43 PM
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