OpticsTalk by SWFA, Inc. Homepage SWFA     SampleList.com
Forum Home Forum Home > Scopes > Target
  New Posts New Posts RSS Feed - 1 MOA at 100 Meters
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Visit the SWFA.com site to check out our current specials.

1 MOA at 100 Meters

 Post Reply Post Reply
Author
Message
smity25ca View Drop Down
Optics GrassHopper
Optics GrassHopper
Avatar

Joined: January/02/2006
Location: Canada
Status: Offline
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote smity25ca Quote  Post ReplyReply Direct Link To This Post Topic: 1 MOA at 100 Meters
    Posted: January/02/2006 at 20:53
Here's an MOA question. If 1 MOA equals 1 inch or 1.047197580733" to be precise at
a 100 yard distance what would it be at a 100 meter distance? As all the ranges up
here in Canada are in meters.
Speed is Fine Accuracy is Finnal (Wyatt Earp)

Ian J. Smith (Cpl)
Camp Borden
Back to Top
silver View Drop Down
Optics Master
Optics Master


Joined: November/04/2005
Location: United States
Status: Offline
Points: 2291
Post Options Post Options   Thanks (0) Thanks(0)   Quote silver Quote  Post ReplyReply Direct Link To This Post Posted: January/03/2006 at 08:07
~26 or 27 mm
"If we weren't all crazy we, We would go insane."   Jimmie Buffet

WWW.formitch.com

Back to Top
smity25ca View Drop Down
Optics GrassHopper
Optics GrassHopper
Avatar

Joined: January/02/2006
Location: Canada
Status: Offline
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote smity25ca Quote  Post ReplyReply Direct Link To This Post Posted: January/03/2006 at 08:57
I see, so at 100 meters it's even closer to 1" than 100 yards it's 1.02362" instead of
1.047197580733" nice to know that there's not a real differance it's only about a 1/4" truer
at a 1000 meters.
Speed is Fine Accuracy is Finnal (Wyatt Earp)

Ian J. Smith (Cpl)
Camp Borden
Back to Top
silver View Drop Down
Optics Master
Optics Master


Joined: November/04/2005
Location: United States
Status: Offline
Points: 2291
Post Options Post Options   Thanks (0) Thanks(0)   Quote silver Quote  Post ReplyReply Direct Link To This Post Posted: January/03/2006 at 09:30

 

 

One inch equals 25.4mm

100 meters 110 yards or 110 % so I added 10% and rounded down, just a hair.  Reason most people tend to over estimate range. As you noted the culmative error is not much. I like things to be a hair under than over for most things.  27.5mm would be a text book answer which most people would then make 28mm. I just applied some error correction early.

"If we weren't all crazy we, We would go insane."   Jimmie Buffet

WWW.formitch.com

Back to Top
cheaptrick View Drop Down
MODERATOR
MODERATOR
Avatar

Joined: September/27/2004
Location: South Carolina
Status: Offline
Points: 20844
Post Options Post Options   Thanks (0) Thanks(0)   Quote cheaptrick Quote  Post ReplyReply Direct Link To This Post Posted: January/03/2006 at 11:12
You guys got me dizzy!!!!!!
 
If at first you don't secede...try..try again.
Back to Top
pascalp View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: September/22/2005
Status: Offline
Points: 3
Post Options Post Options   Thanks (0) Thanks(0)   Quote pascalp Quote  Post ReplyReply Direct Link To This Post Posted: January/06/2006 at 04:45

 

 

Minute Of Angle:

 

Tangente minute  100m  = 0,02908m = 29,1mm

 

Tangent ( 1° / 60  *  100y ) = 0.02908y = 1.04688 inch

Back to Top
CavscoutSniper View Drop Down
Optics GrassHopper
Optics GrassHopper
Avatar

Joined: August/08/2008
Location: Texas
Status: Offline
Points: 14
Post Options Post Options   Thanks (0) Thanks(0)   Quote CavscoutSniper Quote  Post ReplyReply Direct Link To This Post Posted: August/08/2008 at 09:43
Actually 100 Meters is 109 Yards.
CavscoutSniper
Back to Top
sun-sense View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/25/2011
Location: Florida
Status: Offline
Points: 3
Post Options Post Options   Thanks (0) Thanks(0)   Quote sun-sense Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 09:58
Originally posted by smity25ca smity25ca wrote:

I see, so at 100 meters it's even closer to 1" than 100 yards it's 1.02362" instead of
1.047197580733" nice to know that there's not a real differance it's only about a 1/4" truer
at a 1000 meters.



No, its even larger as it is 1.047 at 100 yards and 100 meters is 109 yards, therefore it is 1.141 inches.


Back to Top
8shots View Drop Down
Optics Jedi Knight
Optics Jedi Knight
Avatar
Lord Of The Flies

Joined: March/14/2007
Location: South Africa
Status: Offline
Points: 6067
Post Options Post Options   Thanks (0) Thanks(0)   Quote 8shots Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 11:13
 Moa are a group of flightless birds with no vestiges of wing bones.
 
Oops, wrong moa.
 

In metric units1 MOA at 100 meters = 2.908 centimeters. (1.144inches)



Edited by 8shots - March/25/2011 at 11:16
Back to Top
trigger29 View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar
X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

Joined: September/29/2007
Location: South Dakota
Status: Offline
Points: 4348
Post Options Post Options   Thanks (0) Thanks(0)   Quote trigger29 Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 12:07
Originally posted by sun-sense sun-sense wrote:

Originally posted by smity25ca smity25ca wrote:

I see, so at 100 meters it's even closer to 1" than 100 yards it's 1.02362" instead of
1.047197580733" nice to know that there's not a real differance it's only about a 1/4" truer
at a 1000 meters.



No, its even larger as it is 1.047 at 100 yards and 100 meters is 109 yards, therefore it is 1.141 inches.


This is correct.

"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Back to Top
dsr View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: May/31/2007
Location: United States
Status: Offline
Points: 243
Post Options Post Options   Thanks (0) Thanks(0)   Quote dsr Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 13:20
100 meters * (100 centimeters/meters)*(1 inch/(2.54 centimeter))*Tangent (1/60 degree)
=1.14523 inch
 
 
dsr
Back to Top
sun-sense View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/25/2011
Location: Florida
Status: Offline
Points: 3
Post Options Post Options   Thanks (0) Thanks(0)   Quote sun-sense Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 13:41


KISS.

1\60 = 1.666666666667e-02 of which the tangent = 2.908882168703e-04

109 (yards) x 36 (inches) = 3,924 inches.

2.908882168703e-04 x 3,924 = 1.141


An easier way if you already believe/know that 1 MOA = 1.047 inches at 100 yard.

1.047/100  then multiply by 109 = 1.141




Edited by koshkin - March/25/2011 at 14:45
Back to Top
sun-sense View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/25/2011
Location: Florida
Status: Offline
Points: 3
Post Options Post Options   Thanks (0) Thanks(0)   Quote sun-sense Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 13:46
Oop's.  Sorry.

Delete that first line.  I realized it wasn't right a split second after I submitted it.

For some reason I can't edit. 

I think it really depends on how many decimal places you are using to do the calculations.

Back to Top
hunterwingler View Drop Down
Optics Master
Optics Master
Avatar

Joined: April/03/2009
Location: Idaho
Status: Offline
Points: 1420
Post Options Post Options   Thanks (0) Thanks(0)   Quote hunterwingler Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 15:44
IDK about u guys but would be easier just range everything in yard than meters? I do believe most ranger finder now a days have both choses on them.
I wasn't upset about the black cat crossing my path this morning but mouthing "your fu@#ed" as he passed was just rude.

If Guns kill people mine are all defective
Back to Top
trigger29 View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar
X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

Joined: September/29/2007
Location: South Dakota
Status: Offline
Points: 4348
Post Options Post Options   Thanks (0) Thanks(0)   Quote trigger29 Quote  Post ReplyReply Direct Link To This Post Posted: March/25/2011 at 16:11
Unless you own a Leica. Either way, you're splitting hairs on moa.......... But at loooong ranges, these things do count.

"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Back to Top
338LAPUASLAP View Drop Down
Optics Master
Optics Master

Scope Swapper

Joined: October/17/2009
Status: Offline
Points: 2562
Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: April/10/2011 at 14:26
or at short ranges with small bullets...j/k but no really they do...
No one
Back to Top
308 Sav View Drop Down
Optics Journeyman
Optics Journeyman
Avatar

Joined: July/18/2010
Location: Kentucky
Status: Offline
Points: 362
Post Options Post Options   Thanks (0) Thanks(0)   Quote 308 Sav Quote  Post ReplyReply Direct Link To This Post Posted: April/10/2011 at 16:29
Originally posted by hunterwingler hunterwingler wrote:

IDK about u guys but would be easier just range everything in yard than meters? I do believe most ranger finder now a days have both choses on them.

Not if you are used to the metric system and it is second nature to you. Use what you are used to.

and what is harder  1 moa =  1.047 at 100 yards or 1 moa = 29.1mm at 100m
I would say if you use the metric system then you would choose the latter of you use iffy you would choose the first.
Gerald Baker
Back to Top
stickbow46 View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar

Joined: January/07/2009
Location: Benton, Pa
Status: Offline
Points: 4677
Post Options Post Options   Thanks (0) Thanks(0)   Quote stickbow46 Quote  Post ReplyReply Direct Link To This Post Posted: April/10/2011 at 22:03
You need 50 post to be able to modify your post!
 
Welcome to the OT!
Pearls of Wisdom are Heard not Spoken
Back to Top
Kickboxer View Drop Down
MODERATOR
MODERATOR
Avatar
Moderator

Joined: February/13/2008
Status: Online
Points: 20238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: April/10/2011 at 23:56



100 meters is NOT 109 (or 110) yards, but 109.361 yards.  

You can only ignore the part of the fraction that you cannot correct with your scope adjustments...  how much precision does your instrument allow?  If you "ignore" a part of the fraction, how much is it compounded over range?  

1/4MOA is more precise than .1Mil, but using a .1mil/mil=dot scope is easier than using a MOA/mil-dot scope...even though that has been the most common combination for quite some time (in the US, anyway).  I would prefer to use MOA/MOA, but there aren't enough of those around.  1 "click" with a 1/4 MOA scope (1/4 MOA true) = .26175inch (4 "clicks = 1.047 inch at 100 yards).  1"click" with a .1mil scope = 0.36 inch (3 "clicks" = 1.08 inch" at 100 yards)  If your scope is truly .25in/click at 100 yards, it is .12 inches in error/click... 10 clicks is 1.2 inches in error.  Just things to consider...  
How accurate is your ability to judge distance?  If it is only off by +/- a yard, how much does an inch or so here or there matter?
Finding MOA calibrated reticles has only recently been in "vogue"...


Opinion,untempered by fact,is ignorance.

There are some who do not fear death... for they are more afraid of not really living
Back to Top
jonoMT View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar

Joined: November/13/2008
Location: Montana
Status: Offline
Points: 4835
Post Options Post Options   Thanks (0) Thanks(0)   Quote jonoMT Quote  Post ReplyReply Direct Link To This Post Posted: April/11/2011 at 06:12
If there was ever a case for a shooter to switch to a scope with mil turrets and mil reticles it would be shooting in metric distances. Mils are not metric (although it is common among some European manufacturers to mark their turrets with "1 click = 1 cm"). But both are decimal-based systems so it's easier to correlate the two. Shooters using yards can obviously take advantage of equating inches with MOA, but that's just a convenient mathematical coincidence.

Regardless of which system you use, it pays to get used to thinking in terms of angular corrections. Both MOA and mils are measurements of angularity, not of physical units. Naturally, we want to know and be able to translate those into some physical unit of measure. But as far as shooting goes, that can just be in the back of your mind. It's a lot easier to look through your reticle and say I need to come up .2 mils and dial that in with a matching turret. (Same with MOA/MOA scopes).

Also, take a look at leads sometime in a ballistics calculator. While drops increase drastically with distance, leads don't. Yet if you tried to think in inches or cm, the calculation gets rougher than just noting the angular lead. For example, on a target moving 10 mph the distance covered is 20" @ 100 yards, but 114" @ 500 yards on one of my loads. There's no quick way with a reticle that you're going to be able to convert those units into a correct. But if I look at the ballistics table, the correction is 5.6 mils @ 100 yards and 6.2 mils @ 500 yards. Then it becomes easy to interpolate for distances in between. For 300 yards I can just correct 5.9 mils with the reticle.
Reaction time is a factor...
Back to Top
338LAPUASLAP View Drop Down
Optics Master
Optics Master

Scope Swapper

Joined: October/17/2009
Status: Offline
Points: 2562
Post Options Post Options   Thanks (0) Thanks(0)   Quote 338LAPUASLAP Quote  Post ReplyReply Direct Link To This Post Posted: June/25/2011 at 21:22
Wink
No one
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.207 seconds.