GTA
All Springer/NP/PCP Air Gun Discussion General => Air Guns And Related Accessories Review Gates => Scopes And Optics Gate => Topic started by: Hoosier Daddy on January 28, 2023, 02:07:31 AM
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Looking at an Element scope..
There are some nice choices in reticles over a Hawke
I know what MOA (Minutes Of Angle) is but what is MRAD?
"Minutes Of Radius"?
I don't understand = Does not compute.
https://element-optics.com/product/helix-ffp/ (https://element-optics.com/product/helix-ffp/)
(https://element-optics.com/wp-content/uploads/2022/03/HELIX-6-24X50-FFP-6X10X24X-APR-1C-MOA-FOV-400x400.jpg)
(https://element-optics.com/wp-content/uploads/2022/03/HELIX-6-24X50-FFP-6X10X24X-APR-1C-MRAD-FOV-400x400.jpg)
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Milliradians....
https://bestgunscope.com/mrad-vs-moa/
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Ahhh....
Very good, thank you!
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Make sure the turret adjustments match the reticle. Most of us airgunners have mismatched turrets anyway. The Mildot reticles most of us use are mill radian based while most turrets on our mildot scopes are based in MOA.
People who do a lot of scope dialing want the turrets to be calibrated to the reticle system. They also preferred first focal plane scopes to keep the reticle values true at any magnification.
This is too much math and money for me as most scopes under $500 won't track well or well long enough to making dialing practical. I just use the reticle and try to learn my hold overs at a specific magnification through trial and error. Once you change pellets or magnification it all goes out the window.
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My understanding Element Optics are made to spin the dials, as that is mostly how its designers hunt.
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Thanks.... I am more a "set it and forget it" guy except when I stretch their legs out past 50Y
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Thanks.... I am more a "set it and forget it" guy except when I stretch their legs out past 50Y
For simpletons like myself, I just remember one MOA is one inch at 100 yards. One MIL is 4 inches at 100 meters. And do math from there....
-Y
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my research showed one is metric (MROD)... and the other is SAE (MOA)... but potato patatoe.
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This may help.
https://www.rimfirecentral.com/threads/the-scope-sights-mounts-super-sticky-questions-try-here.496141/ (https://www.rimfirecentral.com/threads/the-scope-sights-mounts-super-sticky-questions-try-here.496141/)
At this site go down to the: Reticle & Subtension Info
Also trivia info:
One MOA Calculation
How to determine one MOA for any target. Note, MOA = minute of angle.
1. Calculate the distance to the target.
2. Convert this number to inches or centimeters for metric.
3. Double this number, (Diameter of a circle).
4. Use Pi, 3.14159 times the number in step 3, (Circumference of a circle is Pi x D).
5. Divide this number by 21,600, (Note 21,600 = minutes in a circle, 360 degrees x 60 minutes in one degree).
This number is the one MOA in inches, or centimeters if used, for this target at the calculated distance or range. Group shots measured center to center.
Example:
1. 100 yards to target.
2. 100 x 3’ x 12” = 3600” to target.
3. 3600” x 2 = 7200”, (Diameter of 100 yard circle in inches).
4. Pi 3.14159 x 7200” = 22,619.448”, (Circumference of 100 yard circle).
5. 22,619.448”/21,600 = 1.04719”, (One MOA at 100 yards in inches).
This number is usually rounded to 1” for the one MOA at 100 yards.
The one MOA = 1” is an ARC measurement and not a straight line as it is a very small section, 1” of the overall circle circumference at 100 yards.
A trivia note – one MOA on the moon is about 69.5 miles! (238,900 miles to the moon).
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Thanks.... I am more a "set it and forget it" guy except when I stretch their legs out past 50Y
For simpletons like myself, I just remember one MOA is one inch at 100 yards. One MIL is 4 inches at 100 meters. And do math from there....
-Y
That has worked for me for many years.
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This may help.
https://www.rimfirecentral.com/threads/the-scope-sights-mounts-super-sticky-questions-try-here.496141/ (https://www.rimfirecentral.com/threads/the-scope-sights-mounts-super-sticky-questions-try-here.496141/)
At this site go down to the: Reticle & Subtension Info
Also trivia info:
One MOA Calculation
How to determine one MOA for any target. Note, MOA = minute of angle.
1. Calculate the distance to the target.
2. Convert this number to inches or centimeters for metric.
3. Double this number, (Diameter of a circle).
4. Use Pi, 3.14159 times the number in step 3, (Circumference of a circle is Pi x D).
5. Divide this number by 21,600, (Note 21,600 = minutes in a circle, 360 degrees x 60 minutes in one degree).
This number is the one MOA in inches, or centimeters if used, for this target at the calculated distance or range. Group shots measured center to center.
Example:
1. 100 yards to target.
2. 100 x 3’ x 12” = 3600” to target.
3. 3600” x 2 = 7200”, (Diameter of 100 yard circle in inches).
4. Pi 3.14159 x 7200” = 22,619.448”, (Circumference of 100 yard circle).
5. 22,619.448”/21,600 = 1.04719”, (One MOA at 100 yards in inches).
This number is usually rounded to 1” for the one MOA at 100 yards.
The one MOA = 1” is an ARC measurement and not a straight line as it is a very small section, 1” of the overall circle circumference at 100 yards.
A trivia note – one MOA on the moon is about 69.5 miles! (238,900 miles to the moon).
Good explanation and example.