What did they do? They converted the bullet drop from cm to inches, but they used the MIL value for yards using Imperial measurement. In this example, the MIL value at yards is 18". If we were to convert both the bullet drop and MIL value for meters , we would use 50 cm and not 18". Converted to inches: For example: With an unspecified rifle and load, for the sake of getting straight to the point, Hornaday provides a Let's double check the formula:.
However, using the same bullet weight, ballistic coefficient, and muzzle velocity in the Hornady calculator that I used in the Federal Premium calculator for. All rifles and ammo will behave differently. Add to that terrain, weather, altitude, humidity, etc.
On top of that, adrenaline and a sense of urgency to hit that trophy bull suddenly makes math almost impossible to comprehend in those moments. Stick with manufacturer ones specific to your rifle and ammo. You must reconfirm your values at the range however you came across it. You might find the math and online apps are somewhat off to what you experience in reality at the range. Now jot down your numbers onto your dope card for future reference.
Let's look at an example using the numbers for the. I will need to turn the turret 4. This means making a total of 41 clicks. Now, let's see what my. The accuracy of your scope will depend on quality. This will determine how consistent and repeatable your results will be. But, most importantly, we need to talk about where your reticle sits in the erector tube. Does it matter? If your scope is in the SFP, it means the reticle sits behind the magnifying lens assembly.
Why is this important? If you have a first focal plane mil dot scope , it means the reticle sits in front of the magnifying lens assembly. You can use it to determine distance, size, and bullet drop at any time regardless of what magnification setting you're in. Each scope will also employ a different type of mil dot reticle. You can have complex dots and lines that span the entire elevation and windage crosshairs to cover up to or more than yards.
It's important to read over specific manufacturer reticles to get an idea of how complex it is, or if it will be simple and fast to employ in the field.
The downside about mil reticles is they tend to get too busy to look at. We had a lot to say on the topic. So, what is a mil-dot scope for? Sure, you can measure size and distance with mils, but most just want to compensate for bullet drop and wind.
It's no easy task to get out there and shoot at any distance and expect to get dead-on without knowing how your scope works and measures angles. These angles translate to distance down range.
Get a lot of practice at the range to become familiar with how your rifle and bullets work, and how you can use your scope to make the best measuring judgements.
To start with, get a notebook and write this stuff down so you can burn it into your brain! When most are in bed sleeping, you will find Chris hunched over a laptop researching the latest and greatest optic types, uses and specifications. Despite a love for writing and researching about optics, Chris prefers to keep out of the spotlight. Thanks for the feedback, it takes a lot of time to put together a resource like this so appreciate your kind words. My only recommendation would be to remove the "for dummies" language.
That could be interpreted negatively by readers. Yes, I definitely see your point of view. The reason we use the word 'dummies' in the content is, believe it or not, a lot of people actually search Google for 'mil dot explained for dummies'.
Having the word on our page helps those people find us in Google. There is a method to our madness and it is certainly not to offend anyone! I've had a hard time finding cohesive information on this topic This is an excellent explanation Simon! Thank you for your effort putting this together! Hi Erik, I'm glad you enjoyed the article! Thank you for pointing out what seems to be a math discrepancy as it does get confusing when you're converting linear measurements and trying to see how it works with angular measurements.
In short, while 3. What we are trying to do is find what the linear measurement is for a mil remembering that mils are an angular measurement. Since we are talking about angular measurement, the centimeter measurement will always be slightly larger than the inch measurement with the same mil adjustment. Because meters is actually equal to It's easier if you don't get tied up in the math between the conversions from inches to centimeters and vice versa.
It's much better to learn the system you do best with remembering that things could change when you actually get to shooting.
The wind, your particular rifle, and other factors can affect bullet impact. In no time, you'll see how easy it is to put linear measurement aside and start making or calling corrections in mils using your reticle. Happy shooting friend! Great question! Bullet drop can easily be calculated with a ballistics calculator. Of course, there may be some minor tweaks due to factors out of your control.
Use the most appropriate adjustment to zero your scope. Hope this info helps. Great Article! It covers just about everything a shooter needs to know about Mil dots. I have been confused for a long time about some information that came with a low cost scope I have had for a couple of years.
In the paper work that came with the scope was a table to cross mil dot readings with a known target size and come up with a range.
They used a formula that was TGT size mtrs X divided by the observed measurement of the target in mils equals the distance in meters. I have seen the very same formula on a number of sites but the multiplier was always been instead of The results of their calculations were always about 10 percent less than what I came up with using the MilDot Master or doing the math by hand. The only thing I can come up with is that the scope is a Second Focal Plane with the highest power being 9X and someone at the manufacturer made some type of "correction" for a 9 power max setting.
This rule is true regardless of the magnification of your scope. We must remember that mils are an angular measurement and not linear. This is usually max power unless the manufacturer has specified otherwise, and in your case, it may very well be 9x.
Army round mil dot version. The table below lists the distance subtended by one MIL at various ranges. Therefore, the scope must be set at the maximum magnification setting i. Once the scope is set to high magnification, the easiest way to range a target is to take the height or width of the target in yards or meters multiplied by , then divide by the height or width of the target in MILs to determine the range to target.
Of course the measurements can be taken in inches. The following examples illustrate this point:. How many yards is it out? As a secondary function, the Mil Dots on the reticle can be set up as aiming points to compensate for holdover and wind drift. We'll address the range finding system first. Most Mil Dot scopes are set up to range find at 10X magnification.
However, some scopes do it at whatever particular magnification the manufacturer has set the scope up for. Please note: Every Mil Dot scope has to be set at a specific magnification when you are using the reticle to estimate range. Be sure to set your scope for the proper magnification when ranging. Chest Height Mil Dots. Antelope or Deer Distance. The idea is to read distance by simply looking thru your scope while aiming. No complicated calculations Just look and know the distance.
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