As a precision rifle competitor and hunter I am always looking for that edge which will help me shoot better and faster in all conditions. Like most people I started off with a simple duplex reticle then graduated to a mil-dot type reticle then more recently onto a Christmas tree style reticle such as the Horus H59. Then came along the Horus TREMOR 3 reticle. This reticle has helped transform my shooting in certain situations (I’m still by no means the best; however, I am always learning and looking to improve, like most of you). The TREMOR 3 with its patented Time Of Flight Wind Dots is such a fast and reliable system most military units around the world are adopting it for their Sniper/DMR rifles.
In this short article I will show you how to calibrate your wind dots for using the TREMOR 3 reticle. It isn’t that difficult and will help you engage your targets with Accuracy, Precision and Consistency when you are not dialing but holding your elevation from your 100m/y zero.
How Do I Determine My Wind Dot Value?
Initially when looking at the TREMOR 3 reticle it might look confusing and hard to decipher. Believe me;q it really isn’t. You just need a little time to train your brain to work with it.
Looking at the reticle you will notice, like a traditional duplex reticle it has a center cross-hair (with a small aiming dot in the center) made by an intersecting horizontal and vertical stadia. Below that horizontal line you can see the wind dots on each mil line. Each mil line has seven wind dots either side of center with the fourth each side being larger than the others.
Using your verified and trued data (this is very important) you will need to use your ballistic calculator.
Note: If you have a Applied Ballistics Kestrel 5700 that device has a feature which will do this calibration of the wind dots for you.
Step 1: Turn off spin drift in your ballistic calculator.
Step 2: Manipulate your target range until 4 mils is your elevation solution.
Step 3: Using this elevation solution adjust your full wind value until your windage solution is as close to 0.95 mils as possible. This will line up with the second wind dot on the 4th mil line.
Step 4: Divide your full wind value determined in step 3 by 2. This is your new wind value for each wind dot for each mil hold.
Lets look at an example using my data for my AX with the 6.5 Creedmoor barrel firing the Hornady 130gr ELDM
Step 1: Turn off spin drift in your ballistic calculator. Here I’m using the Applied ballistics app on my phone.
Step 2: Target range manipulated until 4 mils is my elevation solution.
Step 3: Manipulate the full wind value until it is as close to 0.95mil as possible. *Please note AB mobile only shows 1 decimal place. Going to 7.5mph put the wind solution to 1 mil (besides it works better for the next step).
Step 4: Divide my wind value by 2 to give me the value for each wind dot.
7mph divided by 2 = 3.5mph
Therefore each wind dot for my current system is equal to 3.5mph when holding elevation using my TREMOR 3 reticle. For me to be able to judge 3.5mph winds is not easy however the wind dots give you a bracket to work with. I personally find 5mph easier and that’s pretty much in the middle of the wind dots. But judging wind speed is for another article.
Overall it is quite a simple process and allows you to very quickly hold for wind on target.
If you have any questions please reach out in the comments section below or on my various social media pages.