Advice on productive practice to range using scope. I have a great laser finder but want to learn and build confidence to range with scope.
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mil/mil, ffp I know the formulas but of course knowing the sizes of things. Should I take measurements of things like stop sign, fence post, fire hydrants etc and keep those in my data/dope book? As well as doing like Gray Sqiurrel suggested at the range and measure "things" to use for reference points?
Yes, once you have a handle on using your scope for ranging, you can make a list in your data book of objects with standardized measurements that you may encounter (license plates in the U.S. for example are all 12"x6"). You can also make a ranging cheat sheet by plugging in what you would mil out the various objects (the license plate for example) at different ranges. Then you can just quickly look at your sheet instead of going through with the full equation. Street signs are also almost always standardized as well. Knowing a little bit of code for houses also reveal that many of our residential doors (non-custom) also have standardized measurements. I would obviously caution you about being visible in an urban setting pointing a "scary rifle" at different objects...
Objects like fence posts and other lumber are typically labeled as being standardized, but all have a certain degree of deviation from the dimensions on the labels. In the military, we measured out items on different military vehicles (different vehicle rims for example) since it doesn't get much more standardized and uniformity than the military.
Knowing the math an using the ret is night an day. First rule always range the biggest part of the target if at all possible.
Decide if you are going to enter sizes into you data book in inches or cm's.
Then make up known size poster board targets you can tape onto different colors backers. Your targets should be dull colors at first, this will teach you the percentage error of different lighting an color's. Place them at unknown to you distances, ret range them first then with your LRF or a map/google earth ect. You can place different colors (dull & bright) side by side to see how different colors will add to your error factor very quickly. Some colors are much worst that others to different people. The shape of the target an your ret will also effect how you lay the scope/weapon to range. With the FFP you can range on any power but you will quickly find one power setting is much better than others, as being steady to rock solid while ranging is the name of the game.
Everything said so far depending the std error % you can stand, will be based on cambering, target size an distance. Once you become attune to all colors an targets facing you square, start angling them on both plains away from you. Lastly start hiding different size targets in the woods w/o the perfect back-round.
The final thing I would do, make sure you enter into your data book the size of every shoulder weapon (an larger depending) you may have/want to range. People come in different sizes, most weapons or TO&E gear never change size. Range finders will not range everything, battery's do fail, maps get lost, trashed up, or never issued, but as long as you have the scope the distance can be quickly known.
Good idea, may have to add that. And it reminded me the other thing I do is confirm what I think. I sometimes take my LRF on walks with the dog, etc. guess what a range is, check with the laser. It's helpful.One of the things that helped me long ago was to buy a cheap scope that had a ranging ret an just use it w/o being mounted on anything. As difficult as that is (holding still) you can practice most anywhere w/o drawing looks. Easy to find mil rets but moa are somewhat harder, but becoming more so theses days.
mil/mil, ffp I know the formulas but of course knowing the sizes of things. Should I take measurements of things like stop sign, fence post, fire hydrants etc and keep those in my data/dope book? As well as doing like Gray Sqiurrel suggested at the range and measure "things" to use for reference points?
I second shooter ready. great sim! easy to understand.
The system we were taught in the Army required multiple formulae and turned into a homework project.
When I started working with European Snipers, they had a much simpler and more accurate method for mil relation formula that was one of those moments where you say, "Why didn't I think of that?"
They us mm for TGT dims, then divide by mils read = range in m. Too simple.
45cm wide silhouette or chest width of a man = 450mm.
450mm / 1 mil in scope = 450 meters
With that as a basis, I get a very quick idea of whether the TGT is within 450m or beyond 450m upon TGT detection even for chance contact, chance TGT with limited time exposure. If the chest is wider than 1 mil, I can use holds and make a quick shot with a mil hash reticle with a very high hit probability.
450 / .5 mils = 900m
450 / .6 mils = 750m
450 / .75 mils = 600m
450 / .8 mils = 563m
450 / .9 mils = 500m
For CONUS teaching civilian side, I use my own decimal yards equivalent since we deal in yard ranges, not meters.
For decimal yards, I use 36" as my = 1000 value since 36" is 1 mil at 1000yds. I just drop the zeros from the decimal yard constants.
24" = 666
18" = 500
12" = 333
10" = 278
So for an 18" TGT we use the 500 constant because 18" = 1/2 x 36" or .500 (then drop decimal)
500 / .5 = 1000yds
500 / .6 = 833yds
500 / .7 = 714yds
500 / .8 = 625yds
500 / .9 = 556yds
500 / 1 = 500yds
It's very fast and if you do regular mental math with it on the fly rather than relying on paper, you'll be that much more adept at quickly estimating range. In reality, 18" TGTs are pretty hard to accurately determine the range to once we start getting past 400yds unless you have superb glass, perfect contrast with the TGT and background, and no mirage, but this method really beats the equations with inch and meter conversions.