how to work MOA

[usmc1974]

I have a Lupold mark 4 4.5-14x50 mildot scope 1 click =1/4 MOA at 100 yds. What I am not getting is this. I use a 300 yard zero, at 400 yds it sys come up 3.3 MOA for a 13.8 drop if each click is 1" at 400 how does this equl 13.8 inches.

AT 500 it says the drop is 37 inches and to come up 7.1 MOA, do I then just add 3.8 clicks to the 400 yd 3.3.

Range Velocity Energy Traj UP MOA

Muzzle 2595 2617 -2 0

100 2420 2275 4.9 -4.7

200 2252 1970 5.9 -2.8

300 2090 1698 0 0

400 1936 1456 -13.8 3.3

500 1789 1243 -37 7.1

600 1650 1058 -71.1 11.3

700 1521 898 -117.9 16.1

800 1402 763 -179.8 21.5

900 1295 651 -259.5 27.5

1000 1202 562 -359.9 34.4

1100 1126 493 -484.6 42.1

1200 1065 441 -636.4 50.6

1300 1016 401 -819.2 60.2

1400 976 370 -1035.6 70.6

[R-Bros_JLR]

MOA is an angular measurement equal to 1/60th of a degree, not a linear measurement. At 100 yds, it's 1.047" so at 400 yds 1moa=4.188". 3.3moa x 4.188" = 13.8".

My advice would be to stop thinking about things in terms of clicks and inches. If your drop chart says you need 7.1moa, just dial 7moa on your turret and let er rip. Don't make things more complicated by trying to count clicks and stuff.

Edited August 29, 2014 by R-Bros_JLR

[Tcon260]

The come ups for each yardage past 300 are from your 300 yard zero. So, going from 400 to 500, come up 7.1-3.3 = 3.8 MOA...just like you thought.

13.8" drop at 400 yards is 13.8/4 .188 = 3.3 MOA . 1.047" = 1 MOA @ 100 yards. 1.047 x 4 = 4.188.

[usmc1974]

My advice would be to stop thinking about things in terms of clicks and inches. If your drop chart says you need 7.1moa, just dial 7moa on your turret and let er rip. Don't make things more complicated by trying to count clicks and stuff.

OK so 1 click at 100 = 1/4 of 1.047 What does each click equal at say 600 yards Edited August 29, 2014 by usmc1974

[R-Bros_JLR]

My advice would be to stop thinking about things in terms of clicks and inches. If your drop chart says you need 7.1moa, just dial 7moa on your turret and let er rip. Don't make things more complicated by trying to count clicks and stuff.

OK so 1 click at 100 = 1/4 of 1.047

Yes, that is correct. 1 click is .26" at 100yds, .52" @ 200, 1.047"@400, etc.

edit....Thanks Stlhead, you caught my typo!

Edited August 29, 2014 by R-Bros_JLR

[Stlhead]

My advice would be to stop thinking about things in terms of clicks and inches. If your drop chart says you need 7.1moa, just dial 7moa on your turret and let er rip. Don't make things more complicated by trying to count clicks and stuff.

OK so 1 click at 100 = 1/4 of 1.047

Yes, that is correct. 1 click is .26" at 100yds, .56" @ 200, 1.047"@400, etc.

I know that it is splitting hairs, but wouldn't it be .52" at 200?

[usmc1974]

is this correct?

1 click equals inches @ yards
400 =4.2
500=5.2
600=6.2
700=7.3
800=8.4
900=9.4
1000=10.5
1100=11.5
1200=12.6

[Steve RA]

For we simple folks, just assume a MOA is an inch @ 100 yds and consider whatever multiple of 100yds you are shooting that the same multiplier will apply to one inch.

[davsco]

AT 500 it says the drop is 37 inches and to come up 7.1 MOA, do I then just add 3.8 clicks to the 400 yd 3.3.

Yes but the easier way is just to dial to 3.3 (which probably 3.25 is the closest since you have 1/4 clicks) for 400. And then rotate your dial to 7.0 (closest 1/4 setting to 7.1) for the 500 yard shot. Of course, your turret will have to be set at zero at your 300 yard zero.

just think back to basic algebra. one moa is roughly (1.05 as noted above) an inch at 100 yards, two inches at 200 and 12 inches at 1200 yards. so if you're shooting at a 600 yard target and your spotter says you're a foot (12") low, you'd dial an additional two moa (so eight 1/4 moa clicks). Likewise, if you're shooting at a 1200 yard target and the spotter says you're a foot low, you'd dial one moa up (so four 1/4 moa clicks).

as you probably already know, i heartily encourage you to actually shoot at the various distances you would be doing for hunting or competition or whatever and get precise actual data, as your theoretical trajectory may be somewhat different.

[usmc1974]

Maybe I am missing something but, how do you come up with the .8 of a click.

[davsco]

you don't, you round to the nearest 1/4 as you said your turret is in 1/4 moa increments. so the .8 would be closest to .75 or 3/4 moa or three 1/4 clicks. again if you're dialing for elevation, just dial to the number you're supposed to use, no need to worry about how many clicks it is.

the clicks, and the math, come into play when you need to make adjustments, such as when your spotter says you're hitting a foot low.

[427Cobra]

stop, Stop, STOP!!!!!!! Trying to covert angular measurements to inches, 1 MOA is 1 MOA at 2 feet to 133 light years, it makes no difference what so ever on how many inches it is at whatever distance, a MOA is a MOA, math just makes it confusing. We Americans want to convert MOA to inches, it's what we know, the rest of the world does the samething with MRAD's, at 100 meters .1mrad is 1cm, but MRADs are not metric, and MOAs are not inches

[striped1]

buy a rangefinder, a ballistic calculator and a scope with a horus or horus like reticle and leave the math at home.

[usmc1974]

buy a rangefinder, a ballistic calculator and a scope with a horus or horus like reticle and leave the math at home.

AH, yea it must be nice to be rich.lol I work for the state.

[R-Bros_JLR]

is this correct?

1 click equals inches @ yards

400 =4.2

500=5.2

600=6.2

700=7.3

800=8.4

900=9.4

1000=10.5

1100=11.5

1200=12.6

No, that's not correct. Your scope is labelled as 1 click = 1/4 moa, not 1 click = 1 moa. Your chart above lists 1 moa at each distance.

Maybe I am missing something but, how do you come up with the .8 of a click.

As stated above, you don't. Each click is .25 moa. Therefore, .8 moa would require 3 clicks.

[usmc1974]

is this correct?

1 click equals inches @ yards

400 =4.2

500=5.2

600=6.2

700=7.3

800=8.4

900=9.4

1000=10.5

1100=11.5

1200=12.6

No, that's not correct. Your scope is labelled as 1 click = 1/4 moa, not 1 click = 1 moa. Your chart above lists 1 moa at each distance.

Maybe I am missing something but, how do you come up with the .8 of a click.

As stated above, you don't. Each click is .25 moa. Therefore, .8 moa would require 3 clicks.

Thanks for all the help it is now clear as mud.let me try another chart how about this .

1 click = .26 @100

'' .52@200

" .78@300

" 1.04@400

" 1.30@500

" 1.56@600

" 1.82@700

" 2.08@800

" 2.34@900

" 2.60@1000

[R-Bros_JLR]

If one click = 1/4 moa, then yes. Whether or not your scope clicks are really 1/4 moa is something you'll have to test.

[usmc1974]

If one click = 1/4 moa, then yes. Whether or not your scope clicks are really 1/4 moa is something you'll have to test.

it is a year old Leupold Mark 4 4.5-14x50mm LR/T Mil dot. I called Leupold gave them the SN# an they confirmed it is 1 click = 1/4 inch at 100. we will see this Saturday I am going to Spearpoint ranch for their 300 to 1400 yard long range match only one stage out to 1400 most of the stages will be between 300 -800 yards with at least one mover at I believe 400 yards. All the steel targets are 16"x18" but the mover is a moving IPSC paper target. thanks B

Edited September 3, 2014 by usmc1974

[Steve RA]

Good luck !

[427Cobra]

1click is 1/4 MOA, not 1/4 inch, stop Stop STOP converting angular measurements to inches

[usmc1974]

you don't, you round to the nearest 1/4 as you said your turret is in 1/4 moa increments. so the .8 would be closest to .75 or 3/4 moa or three 1/4 clicks. again if you're dialing for elevation, just dial to the number you're supposed to use, no need to worry about how many clicks it is.

the clicks, and the math, come into play when you need to make adjustments, such as when your spotter says you're hitting a foot low.

Thanks davesco and all you other guys. Dope worked pretty good I just ran out of time on the 400-1400 yard stage running a 5 round mag on a bolt gun.you only had 5 minutes but I did get to the 800 yard target. very cool fun. I think I will run my lilja custom AR10 with 155 palma bthps at about 2950 from now on.

[Rob01]

1click is 1/4 MOA, not 1/4 inch, stop Stop STOP converting angular measurements to inches

BINGO! You are just confusing yourself. Run your data in MOA and then dial it on. No need for inches anywhere. Worrying about clicks and inches is just useless conversions.

[usmc1974]

1click is 1/4 MOA, not 1/4 inch, stop Stop STOP converting angular measurements to inches

BINGO! You are just confusing yourself. Run your data in MOA and then dial it on. No need for inches anywhere. Worrying about clicks and inches is just useless conversions.

in the end it all comes down to inches on paper, down, up, left or right..

[Rob01]

1click is 1/4 MOA, not 1/4 inch, stop Stop STOP converting angular measurements to inches

BINGO! You are just confusing yourself. Run your data in MOA and then dial it on. No need for inches anywhere. Worrying about clicks and inches is just useless conversions.

in the end it all comes down to inches on paper, down, up, left or right..

Maybe if you are measuring a group size but for dialing on or holding data, shot corrections or zeroing you use the reticle and make the adjustment. It's the ruler in front of your eyes in the same graduations as what you will be dialing on telling you the adjustment that is needed. People make MOA and mils far too complicated.

[elguapo]

1click is 1/4 MOA, not 1/4 inch, stop Stop STOP converting angular measurements to inches

BINGO! You are just confusing yourself. Run your data in MOA and then dial it on. No need for inches anywhere. Worrying about clicks and inches is just useless conversions.

in the end it all comes down to inches on paper, down, up, left or right..

Wasting your time trying to correlate angular to linear measurements is probably how you ran out of time.

I'm also going to tell you that you are wrong in your approach to managing dope and comeups, but what do I know, only been shooting precision rifle in one form or another for the past 15 years and ended up as NRA Master in rifle disciplines including LR Prone.

You come here asking for help then tell us we're wrong when we tell you what you don't want to hear. Good luck.