How to use ratio of meters to centimeters and vice-versa using a MRAD riflescope.
#riflescopeforhunting #sniper #rifleshooting
This video is an introduction on how to use the metric system's unit of length - the meter - and how its applied using an MRAD riflescope.
Below: Points covered in video and some bullet-drop examples.
1.) 1 Mil is always 1 Mil at any distance.
2.) Mil or milliradian (MRAD) is a unit of "angular" measurement.
3.) Reticles have mil-dots etched into the scope's glass. 1 Mil is the distance between the
middle of one mil-dot to the middle of the next mil-dot.
4.) We can use mil-dots to determine distance to target and find the target size.
5.) The metric system's unit of length measurement - meter - is a decimal-based system.
[ 0.1 (tenths), 0.01 (hundreds) , 0.001 (thousands ]
6.) 1 Mil is 1/1000th (0.001) of a radian. (See my video on where Radian comes from)
7.) Riflescope turrets using mil values come in different flavors: a common MRAD
riflescope turret design is " 0.1 Mil per 1 click " on the turret. I use this type in this video.
8.) Once the distance to target is known using linear measurement - meters - we make
"angular" adjustments using the riflescope's turret.
9.) To find the value of what 1 Mil is at any distance: distance in meters (m) / 10 =
answer in cm. Example: 100 meters / 10 = 10 cm.
10.) We find the centimeter (cm) size of 1 Mil at any distance by knowing the following:
a. 1,000 meters can be subdivided by 100 meter values: this
gives us 10 equal parts. Each one of these 10 blocks is essentially 1/10th of 1,000
meters. So, at 100 meters we have 1/10th or 0.1 meters. At 200 meters we have
2/10th's or 0.2 meters, at 3/10th's or 0.3 meters and so on down to 1,000 meters. So
10/10 is 1 meter.
11.) We then convert each of the tenths at the different meter distances ( 100m, 200m,
300m, 400m, and so on down to 1000m) into centimeters (cm).
12.) Therefore, 1 Mil at 100 meters is 1/10th or 0.1 meters and is converted to centimeters
( by multiplying by 100 ) and we get 10 cm. So, 1 Mil at 100 meters is 10 cm tall.
Repeating this, 1 Mil at 200 meters is 2/10th or 0.2 meters and converts to 20 cm tall.
So, 1 Mil at 200 meters will be 20 cm tall. We can repeat this all the way up to 1000
meters.
Now we can apply the above to a MRAD turret.
Take for example an MRAD riflescope with turrets that increment in: 1 click = 0.1 Mil.
Example: If our target is at 100 meters and our bullet-drop is 5cm we can use simple calculations for adjustment:
Remember: [ 0.1 Mil per 1 click ].
We can break it down further for a 100 meter distance: [1 Mil @ 100 meters is 10cm. ]
1 Mil = 10 clicks: 1/10th, 2/10th, 3/10th, ..., ... , 9/10th, 10/10 or 1.
one click (0.1mil per click) is 1cm.
two clicks (0.1 mil per click ) is 2cm.
three clicks (0.1 mil per click) is 3 cm.
ten clicks (0.1 mil per click) is 10 cm. ( 1 Mil on the turret is 10 clicks)
Answer: If our bullet-drop is 5 cm then we adjust UP by 5 clicks ( 5 cm ).
We can break it down further for a 200 meter distance: [1 Mil @ 200 meters is 20cm. ]
(1 Mil = 10 clicks: 1/10th, 2/10th, 3/10th, ..., ... , 9/10th, 10/10 or 1.)
one click (0.1mil per click) is 2 cm.
two clicks (0.1 mil per click ) is 4 cm.
three clicks (0.1 mil per click) is 6 cm.
four clicks (0.1 mil per click) is 8 cm.
...
...
ten clicks (0.1 mil per click) is 20 cm. ( 1 Mil on the turret is always 10 clicks)
We can repeat the above up to 1000 meters.
Now to use a formula to find the value of "what 1 Mil is at any distance".
Formula: 1 Mil = Distance in meters / 10
Example: 100 meters / 10 = 10, so 1 Mil @ 100 meters = 10 cm.
200 meters /10 = 20, so 1 Mil @ 200 meters = 20 cm.
460 meters /10 = 46, so 1 Mil @ 460 meters = 46 cm.
600 meters / 10 = 60, so 1 Mil @ 600 meters = 60 cm.
Bullet-drop problem: if BD is 16 cm low at 600 meters: (let's take a look):
1 click = 6 cm,
2 clicks = 12 cm,
3 clicks = 18 cm. (our best choice then adjust)
Bullet drop formula:
Bullet drop / 1 mil size for that distance = mils needed to adjust:
Bullet drop at 600 yards: 16cm / 60 = mils needed to adjust.
Ans: 0.2666 or 0.3 mils. 3 clicks.
Bullet drop at 500 yards: (convert inches to cm) say, 6 inches: 15.24/50 = 0.3048 mils
or 0.3 mils. So, 3 clicks at 500 yards.
Solution:
@ 500 meters: 1 mil at 500 meters is 50 cm.
1 click is 5 cm
2 clicks is 10 cm
3 clicks is 15 cm