Touché
Yes, they'll only move the POI 1/16" at 25yds.
1/4 MOA at 25 yards is roughly 1/16".
-
ODT Gun Show & Swap Meet - May 4, 2024! - Click here for info
Need some scope help
- Thread starter BIGLEW
- Start date
Touché
Yes, they'll only move the POI 1/16" at 25yds.
1/4 MOA at 25 yards is roughly 1/16".
Yes you will have to correct with more clicks since it is at 1/6 instead of the 1/4 you would at 100. As you move out toward 100 the number of clicks for correction decreases.
Here is a brief description of MOA for those that may not know, it's very simple.
MOA = Minute of Angle, it's a measure of an angle.
Start with a circle, 360 degrees in a circle. Now take 1 of those degrees and subdivide it into 60.
So 1/60th of a degree is a MOA (as there are min 60 min in an hour).
If you want to calculate to prove it for yourself, draw a right triangle, the angle is 1/60degree, the adjacent side if the distance to the target and solve for the opposite side. Here's the match for 100yrds, covert to inches and solve. Answer: 1MOA @100yrds = 1.047 inches
www.mathportal.org/calculators/plane-geometry-calculators/right-triangle-calculator.php?val2=3600&val4=0.016666667&rb1=a&ch1=expl
The basics are, the bullet travels in an arch to hit the target. To move the impact point of the bullet you move your sight (X)MOA.
approx (inches)
25yrds ~ 0.25inches
50yrds ~ 0.50inches
75yrds ~ 0.75inches
100yrds ~ 1inches
200yrds ~ 2inches
300yrds ~ 3inches
400yrds ~ 4inches
500yrds ~ 5inches
1000yrds ~ 10inches
Sights/scopes have different movements from 1moa/click to 1/2, 1/4, 1/8.
MOA = Minute of Angle, it's a measure of an angle.
Start with a circle, 360 degrees in a circle. Now take 1 of those degrees and subdivide it into 60.
So 1/60th of a degree is a MOA (as there are min 60 min in an hour).
If you want to calculate to prove it for yourself, draw a right triangle, the angle is 1/60degree, the adjacent side if the distance to the target and solve for the opposite side. Here's the match for 100yrds, covert to inches and solve. Answer: 1MOA @100yrds = 1.047 inches
www.mathportal.org/calculators/plane-geometry-calculators/right-triangle-calculator.php?val2=3600&val4=0.016666667&rb1=a&ch1=expl
The basics are, the bullet travels in an arch to hit the target. To move the impact point of the bullet you move your sight (X)MOA.
approx (inches)
25yrds ~ 0.25inches
50yrds ~ 0.50inches
75yrds ~ 0.75inches
100yrds ~ 1inches
200yrds ~ 2inches
300yrds ~ 3inches
400yrds ~ 4inches
500yrds ~ 5inches
1000yrds ~ 10inches
Sights/scopes have different movements from 1moa/click to 1/2, 1/4, 1/8.
What is tge circumfrance of a circle?
2πr
2π = 6.283 radians
1 milliradian is 1/1000th of a radian
So 6283 milliradians in a circle
1 mrad will be 1/1000th of your targets distance
So at 100 yards, 1 mrad is .1 yards or 3.6 inches
1000 yards, 1 mrad is 1 yard or 36 inches
1000 meters, 1 mrad is 1 meter or 39.37 inches
When you have a first focal plane scope it is better to correct using the reticle so there is no way to mess up the conversions. For instance if you see your vapor trail and the bullet impacts low and to the right, you can guess how many inches that is and then convert to mils or moa then dial it in the scope.... or you can use the scope reticle to measure in moa/mils and apply that to the turrets or holdover with the reticle. This only works with second focal plane scopes when they are set to a specific magnification, usually 10x or max magnification.
2πr
2π = 6.283 radians
1 milliradian is 1/1000th of a radian
So 6283 milliradians in a circle
1 mrad will be 1/1000th of your targets distance
So at 100 yards, 1 mrad is .1 yards or 3.6 inches
1000 yards, 1 mrad is 1 yard or 36 inches
1000 meters, 1 mrad is 1 meter or 39.37 inches
When you have a first focal plane scope it is better to correct using the reticle so there is no way to mess up the conversions. For instance if you see your vapor trail and the bullet impacts low and to the right, you can guess how many inches that is and then convert to mils or moa then dial it in the scope.... or you can use the scope reticle to measure in moa/mils and apply that to the turrets or holdover with the reticle. This only works with second focal plane scopes when they are set to a specific magnification, usually 10x or max magnification.
