The Overwatch - Long Range Shooting

You’re not going to hit your target 100% of the time. And if you are, you need to move your target further back or make it smaller. Missing the target is part of long-range shooting, but there is a way to help increase your hit probability. That is simply by understanding the errors in the system. If you know the errors and how to incorporate them into your calculations, you can increase your chances of an impact.

Mil Formula

Target SIze (in) x 27.77 / Target Size (Mils) = Distance (Yards)

8*27.77/.42=528.9 yards

Wind Formula

Wind Speed (mph) / Gun Number x 1/1000 of Distance x Sine = Wind Correction in Mils

   10/4*.53*.25=.33 mils

Target Wind Speed

Target size in mils / 1 Mph wind effect

   .42/.03=14 mph

https://theoverwatch.wixsite.com/theoverwatch/blank-page

1. Determine the wind speed.

2. Divide the wind speed by the Q.W. number.

3. Multiply the Q.W. dope by the quotient.

4. Determine the SIN of your wind angle.

5. multiply the product by the SIN of the wind angle.

EX.1 - 600 yards, with a 12 mph wind from 1:00 with a 4 mph gun

1. 12 MPH wind

2. 12 / 4 = 3

3. .6 x 3 = 1.8 Mils

4. 1:00 = .5 sin

5. 1.8 x .5 = .9 Mils to adjust for the wind

EX.2 - 600 yards with a 12 mph wind from 1:30

1. 12 mph

2. 12 / 4 = 3

3. .6 x 3 = 1.8 Mils

4. 1:30 = .7 SIN

5. 1.8 x .7 = 1.26 Mils to adjust for the wind

EX.3 - 700 yards, 15 mph wind from 2:00

1. 15 x 7 = 2.14

2. .7 x 2.14 = 1.49 Mils

3. 1.49 x .86 = 1.28 Mils

Use your bullets G1 B.C. to get your gun's wind number.

EX:

.308 - 175 SMK G1 B.C. - .505 = 5 MPH GUN

6.5C - 147 ELD-M G1 B.C. - .697 = 7 MPH GUN

In this episode, I explain the error with the bullet's "true B.C."

and how to correct that if it's needed.

Where Does The Wind Matter?

https://kestrelinstruments.com/mwdownloads/download/link/id/100/

Official Overwatch website:

https://theoverwatch.wixsite.com/theoverwatch

Using the clock method, Every 30 Minutes Is A 15º Angle:

12:00 - 0º - 0 

12:30 - 15º - .25 

1:00 - 30º - .50

1:30 - 45º - .70

2:00 - 60º - .86

2:30 - 75º - .96

3:00 - 90º - 1

In this episode, we discuss how to get your wind angle and SIN. This will be used in our formula to calculate and dial our wind correction into our scope.

https://theoverwatch.wixsite.com/theoverwatch/blog

Using the clock method, Every 30 Minutes Is A 15º Angle.

12:00 - 0º - 0

12:30 - 15º - .25

1:00 - 30º - .50

1:30 - 45º - .70

2:00 - 60º - .86

2:30 - 75º - .96

3:00 - 90º - 1

N - E = 0º - 90º

E - S = 90º - 0º

S - W = 0º - 90º

W -N = 90º - 0º

Ranging Formula For Mils

Target size in inches x 27.77 / Target size in Mils

10" target measuring .5 Mils wide

10 x 27.77 / .5 Mils = 555.4 Yards

Click Value Formula

1/100 distance in yards / 2.777 x click

500 yards with .3 Mils = 3 clicks

5 x 2.777 / 3 = 5.4"

Episode XVI - Practicing Fundamentals of Marksmanship

Steady position

Sight picture/alignment

Controlled breathing

Trigger control

In this episode, we review how to build our Quick Drop Chart. The data we need for this is our Trued Dope from 100 - 1000 Yards, wind correction per 1 mph, cosine angle, Coriolis and spindrift correction, quick wind number, quick dope number, and optional quick drop numbers for bracketing. To see an example of the chart visit: https://theoverwatch.wixsite.com/theoverwatch/inventory

In this episode, we are going over how to build the chart with Excel to make our quick drop chart.

To make long-range hits, you must true your muzzle velocity and use the correct B.C. We go over that in this episode of The Overwatch!

I use the B.C. from Applied Ballistics by Brian Litz. The B.C. is measured at Mach 1.2 or just before Transonic. Once you have updated your B.C., you will need to shoot out to your bullet's maximum effective range (Mach 1.2) or as close to it as you can get. In your ballistic calculator, you will update your drop chart to how many Mils or MOA you need. This will true your muzzle velocity. Then confirm from 100 yards out to distance.