Moa

G

Gerald

CGN Regular
Rating - 99.6%
233   1   0
Location
Ontario
When someone says that their rifle shoots minute of angle at 400 yds surely that does not mean 1 inch at 400 yds. It would mean 4 inches at 400 yds would it not?
 
Minute Of Angle. 1 MOA= 1/60th of a degree, as in 60 minutes in an hour, one hour is one degree. 1 MOA change in angle is equivalent to 1.0471976" of perpendicular linear movement at 3600" (100 yards)
 
MOA is about 1 inch group at 100 yards, or 2 inches@200 yards, 3 inches @300 yards. it also works coming closer if you shoot with irons, 1 MOA at 50 yards is 1/2 inch, 1/4inch at 25 yards...


Its a term relative to linear distance.
 
so what does it mean on scoped/red dots? Does it mean scopes/red dots with 2 MOA are better than the ones with 4 MOA or vice versa?
 
I think you might be referring to the dot size in scopes. If you have a 4 MOA dot, the diameter of that dot should cover approximately 4 inches of the target at 100 yards. A 2moa dot is 2 inches at 100 yards. The smaller dot makes for a finer aiming device.
The exact angle of MOA is 1.047 inches at 100 yards. At 1000 yards its 10.47 inches. Its close enough to 1 inch that few people need not account for it. Once you start stretching the distances you shoot at, these minor differences translate into misses on your targets.

If however you are referring to the adjustments on your scope turrets, thats a different story.

Hope this helps
 
Its a measurement of your shot groups, not of a scope, but a scope should improve your groupings by reducing vision error. 2MOA is better than 4MOA, OR2 inch group at 100yards vs 4 inch group at 100 yards. Which is better?
 
Barks said:
I think you might be referring to the dot size in scopes. If you have a 4 MOA dot, the diameter of that dot should cover approximately 4 inches of the target at 100 yards. A 2moa dot is 2 inches at 100 yards. The smaller dot makes for a finer aiming device.
The exact angle of MOA is 1.047 inches at 100 yards. At 1000 yards its 10.47 inches. Its close enough to 1 inch that few people need not account for it. Once you start stretching the distances you shoot at, these minor differences translate into misses on your targets.

If however you are referring to the adjustments on your scope turrets, thats a different story.

Hope this helps
Click to expand...

Good explanation!

I understand the first part now.

Could you please explain to me MOA on the adjustments on a scope turrets?
 
Blastattack said:
Minute Of Angle. 1 MOA= 1/60th of a degree, as in 60 minutes in an hour, one hour is one degree. 1 MOA change in angle is equivalent to 1.0471976" of perpendicular linear movement at 3600" (100 yards)
Click to expand...

Just wanted to point out that this is correct, except that it has nothing to do with a clock, or hours. There are 360 degrees in one full rotation, so 1 MOA is 1/60th of 1/360th of one full rotation. Think in terms of a compass, not a clock.

OP,

Imagine yourself standing in the middle of a circle, and the image you see here is a top view, looking down on your head.

EXPT2A1.GIF


If you extend your arms out in front of you, try to imagine your arms as the "7" and "12" lines in the image, forming roughly a 40 degree angle (the numbers in the image above are for illustration only, and are meaningless in this explanation). Now imagine moving your arms closer together, and trying to make a 1 degree angle. Now, 1 MOA is 1/60th of that angle! So 60 MOA would be a 1 degree angle. As you can see, 1 MOA is a very small angle! If you measure the distance between your arms at your finger tips (pretending your arms are 2.5 feet long), there would be 0.008" between your hands. If you stretched your arms so they were 50 yards long, there would be roughly 0.5" between your hands. and if they were 100 yards long, there would be 1" between your hands, if they were 200 yards long, there would be 2" between your hands, and so on. That distance between your hands is what 1 MOA represents.

When we are talking about scope adjustments, we're talking about moving the line of sight in your scope away from, or toward, the line/path that the bullet takes. If you adjust 1 MOA into your scope, you are moving the line of sight in your scope 1 MOA in relation to the path of the bullet. In most scopes, 1 click equals 1/4 MOA, so 4 clicks would be 1 MOA, which would be equivalent to moving the crosshairs away from or toward the bullet path by 1" at 100 yards, 2" at 200 yards, and so on.

It's kind of like separating your arms, or bringing them closer together, by 1/60th of a 1 degree angle. If your arms were 200 yards long, the distance between them would be 2" at 200 yards, 1" at 100 yards, and as you get closer to the starting point (where you're standing), the distance between your arms gets smaller and smaller, until you get to where you're standing, which is where your arms are completely together, and there is no distance between them at all.

Hopefully that helps your imagine what 1 MOA is, and what MOA means.
 
There are 60 minutes in 1 degree of angle and 360 degrees of angle in circumference of a circle....some trivia, 1 MOA of lat. or long. on the earth is 1 nautical mile (roughly 1.1 statue miles) so 1 degree = 60 nautical mile x 360 degrees (circumference of a circle)= 21,600 nautical miles for the circumference of the earth x by 1.1 = 23,760 miles. So if it was possible to fire a bullet from the center of the earth to the surface of the land 1 MOA would equal about 6076 ft.
cheers
 
You must log in or register to reply here.
Back
Top Bottom