Range Results

[Duman]

I'm still trying to understand the whole MOA thing. I know it means minute of angle, but aside from that, not much else.

You can draw a right triangle, the base of the triangle is a straight line from the bench to the center of the target.

At the target, the bullet impact will be off center, draw a line from the center of the target to the bullet impact point. This will be the number of inches from center to bullet impact.

If you are shooting at 100-yards, and your bullet misses the center of the target by 1-inch, this is 1-MOA, 1" / 100-yds. == 1-MOA.
If you are shooting at 200-yards, and your bullet misses the center of the target by 1-inch, this is 1/2 MOa, 1/2" / 100-yds. == 1/2 MOA
If you are shooting at 200-yards, and your bullet misses the center of the target by 2-inches, this is 2" / 200-yds. == 1" / 100-yds. == 1-MOA

<---------------------------------------------------- 100-yds. -------------------------------------------------------------->
------------------------------------------------------------------------------------------------------------------------Center of target
.................................................. .................................................. .................................................. .....V
.................................................. .................................................. .................................................. .....V
.................................................. .................................................. .................................................. .....V 1" ==1-MOA
.................................................. .................................................. .................................................B ullet Impact

[CoGirl303]

First, quit selling yourself short and using an excuse about math as a crutch. The concept of MOA requires no math to understand. When I get home, I'll try to make a crude drawing to give you the basic concept, them when you go back and read the responses, everything will make more sense, no math required. Once you see it drawn out in a diagram, the concept will "click."

numbers in general just go into a puzzle in my head.

[Duman]

1-MRAD == 10-cm at 100-meters.

<---------------------------------------------------- 100-meters -------------------------------------------------------------->
------------------------------------------------------------------------------------------------------------------------Center of target
.................................................. .................................................. .................................................. .....V
.................................................. .................................................. .................................................. .....V
.................................................. .................................................. .................................................. .....V 10-cm ==1-MRAD
.................................................. .................................................. .................................................B ullet Impact

[Irving]

I'm not sure how this picture will show up on other's screens or phones, so bare with me. This is my very simplified explanation of Minute of Angle (MOA). First, forget about any numbers, or math. Just deal with grasping the basic concept. One minute of angle is an angle that is X degrees, what X is, doesn't matter. Imagine an angle, any angle, where the point starts at the barrel of the gun, and the angle continues on into infinity. Since it is an angle, the lines get further and further apart the further they travel from the barrel. My crude drawing shows 1 MOA in black, and 2 MOA in red. I tried to draw 2 MOA as having twice the angle of 1 MOA, but of course it is not to scale.

Remember that MOA is simply a measurement of accuracy. For the following example, just assume that the shooter is a perfect robot and there are no other factors like wind or whatever to throw off the shot. If a rifle A can achieve a level of accuracy of 1 MOA, the group size would theoretically always fit between the black lines at whatever distance. You can see that the group opens up the further away the target gets, but the level of accuracy does not change. If rifle B is only capable of 2 MOA of accuracy, it's groups will always fit between the two red lines, no matter the distance.

Once you've wrapped your head around the first part, the part about what each Mil represents at each distance should come together easier. One Mil is a fixed measurement, but it is applied differently at different distances. The simplest way I can explain that part is to have you use your thumb at arms length. At a distance across the room, your thumb will cover someone's face. At a distance of a city block, your thumb will cover a house. At the distance of the moon, your thumb will cover the entire moon. So in a room, if you were to adjuster your "thumb sight" one thumb width to the left, your point of impact would move to the left about the width of a face, say six inches. But at the distance of a city block, now your point of aim has moved to the left about the width of a house, say 40 feet. And if you were shooting at the moon, and moved your "thumb sight" just one thumb width left, you'd miss the moon, which is however many thousand kilometers. Even though you made the same adjustment, your sight was off further and further as you got further away from the target.

Hope that helped and wasn't even more confusing. If it did help, go back and read all the posts again, especially the ones with real life numbers, and hopefully it will make more sense.

[MrPrena]

Okay. I am going to take nerd side of me for few "mili"second.

DEGREES
Entire circle is 360degrees
1 minute is 1/60 degree. when someone say 1 MOA, it means 1/60th degree. 1 SOA is 1/(60x60) degree.

How do you get 1MOA = 1 inch? bro?


length of shooting dist(adjecent dist ;x) = 100yd
angle A= 1/60 degrees (1')
how much is opposite distance? (target spread)
by doing "SOH-CAH-TOA" (from when I was 14 years old.)

we got Opposite distance and the Angle (TOA Tan A=y/x or hs will say TAN A= OPP/ADJ)

tan (1/60deg; 1MOA)= y/100yd
100yd *tan (1/60)= y
y=0.029yd
=~1.047"

For 200yd, sub 200 into x.
then it is ~2.09"


RADIAN
Entire circle is 2Pi rad
so 1 radian is about ~57.29580 degrees ( rad= 360/2pi)

Mili is 1/1000, so if you put 57.30/1000
MRAD= 0.0572958 degree (~0.573)
MRAD "AINT" a distance. it is an angle.
Maybe we can say "MRAD at 100 is x" like how we say 100yd at 1MOA is 1."

So, 1 MRAD at 100yd will be approx 5.730 inches



My personal opinion:
If you are into math to calculate the angle in radian. Scientist/Mathmaticians/Engineers uses radians. HS Trig and Geometry uses radian. it is simplier using radian doing some math involved.
If you are very familar with degree system and know how you get minute of angle is equivalent to approximate 1.04" at 100yd , then, maybe Minute-of-angle system might be better.

I use MOA system, because I don't think I will be deriving sin pi/4 of an angle at shooting. It will be in 1/1000 (agian mili radian MRAD).

[Irving]

See? Totally simple!

Shouldn't it be 1/360 instead of 1/60?

[MrPrena]

See? Totally simple!

Shouldn't it be 1/360 instead of 1/60?

You mean 1' (Minute of angle)? It will be 1/60 degree, because there are 60 minutes in 1 degree.

Now, if it is 1" (Second of angle), it will be 1/3600 degree in 1 second.

[Irving]

My bad. That's why I draw graphs instead of doing real math.

[MrPrena]

I rarely shoot long distance now, and I sometimes have to think for 5+ seconds how much I need to turn the knob to raise/lower at certain distance(s).

[Wolfshoon]

RADIAN
Entire circle is 2Pi rad
so 1 radian is about ~57.29580 degrees ( rad= 360/2pi)

Mili is 1/1000, so if you put 57.30/1000
MRAD= 0.0572958 degree (~0.573)
MRAD "AINT" a distance. it is an angle.
Maybe we can say "MRAD at 100 is x" like how we say 100yd at 1MOA is 1."

So, 1 MRAD at 100yd will be approx 5.730 inches

MrPrena:
I agree with everything you said up to the part in red. This is by no means a pissing match and am impressed with your memory of math from 14 years old, I wish I was as cognizant with my memory.

1" = 1 MOA :is the quick dirty standard that is easy to understand for the masses, even if not accurate, but it is close. To make matters even worse there are a couple scope makers using "SMOA" (shooters minute of angle) where they did in fact make their clicks true 1/4" values at 100yards and one of them was selling their products as true MOA scopes.


Both MOA and MIL are angular measurements, not distance measurements.



I'm still trying to figure out how you got 5.73" for 1 MIL at 100yd because everything is correct prior to that line...............

Borrowed from looserounds.com http://looserounds.com/2015/01/19/mo...med-up-nicely/

What is MOA? MOA stands for minute of angle. There are 360 degrees in a circle and each degree is divided into 60 minutes. If we round to the nearest 1⁄100 of an inch, at 100 yards 1 degree measures 62.83 inches. One MOA, 1⁄60 of that, measures 1.047 inches. While 1 MOA at 100 yards equals 1.047 inches, at 200 yards it equals 2.094 inches (2 x 1.047). To calculate MOA at any distance, multiply 1.047 by the distance in yards and divide by 100.

What is a MIL? MILS (milliradians) is another angular measurement. There are 6.2832 (π x 2) radians per circle. There are 1,000 mils per radian so, there are 6,283.2 mils in a circle. There are 21,600 MOA in a circle, so a little quick division determines there are 3.4377 MOA per mil. At 100 yards, 3.4377 MOA equals 3.599 inches (3.4377 x 1.047). Rounded up, one mil equals 3.6 inches at 100 yards. A mil is so large, it’s broken into tenths in order to make precise adjustments. If you have a riflescope with mil adjustments, each click equals 1⁄10 mil. A tenth of a mil equals .36 inch or .9144 centimeter at 100 yards. Since 1⁄10 of a mil is an angular measurement, it will be slightly larger at 100 meters than at 100 yards because 100 meters equals 109.361 yards. At 100 meters, 1⁄10 of a mil equals .9999 centimeter. Practically speaking, 1⁄10 of a mil equals 1 centimeter at 100 meters. Because mil, like MOA, is an angular measure, the length it represents increases with distance. For example, 1 mil at 100 yards equals 3.6 inches and 7.2 inches at 200 yards. To calculate how many inches are in a mil at any distance, multiply 3.6 times the distance in yards and divide by 100.

Going back to the OP, her scope is in MIL's so any talk of MOA is not helping her and from what I'm reading she is a newbie at any type of distance shooting and any talk of MILS and MOA is confusing. For her purposes she needs to get the scope mounted and zero'd for 100 yards and practice until she gets good repeatable precision and accuracy. Then she can start talking about longer distances and what the MIL hashmarks in her scope do, but until then this is all wasted talking points.